Chapter 3: Clue in the Dark

Footsteps grew closer. The light from a flashlight began to illuminate the stairway leading to the basement, casting long shadows on the walls. Leo and Lucía exchanged glances, caught between the impulse to flee and the need to protect what they had just discovered.
"Turn off the flashlight," Leo whispered, pulling Lucía toward a pile of old boxes against the wall.
Lucía obeyed, and they both hid behind the pile, trying to control their breathing. From their hiding place, they watched as the man on the top floor slowly descended, his flashlight moving in all directions.
"I know you're here," he said in a cold voice, his words echoing in the empty basement.
Lucía squeezed Leo's arm, and he leaned slightly to spy on the intruder. The man carried a briefcase in one hand and a metal tool in the other, as if ready to force something.
When he reached the metal door, he stopped. He examined the two medallions embedded in the carved triangle and frowned.
"Interesting..." he murmured, running a finger along the edges of the medallions.
Leo felt a knot in his stomach. If the man managed to open the door, all their efforts to uncover the mystery would be in vain, and, worse, they could be in danger if he noticed them.
"We have to do something," Leo whispered in Lucia's ear.
"Do something? What do you propose? Go out and tell him to stop?" she replied, her lips barely moving.
Leo looked around, searching for something they could use. His eyes stopped on an old pipe sticking out of the wall near where they were hiding. It was long and rusty, but it might be loud enough to distract the man.
"I'm going to pull this pipe. When I do, run for the ladder, understood?" —he said to Lucía in an urgent whisper.
"You can't be serious!" she murmured, but Leo was already carefully grabbing the pipe.
With a swift movement, he pushed the pipe, which fell to the floor with a loud metallic clang.
The man immediately turned, shining his flashlight toward the noise.
"Who's there?" he growled, moving toward the source of the sound.
Taking advantage of the distraction, Lucía pulled Leo and they both ran toward the stairs. Their footsteps echoed in the basement, and although they tried to move quickly and quietly, they knew the man had heard them.
"Stop right there!" he shouted, as he began to chase them.
Leo and Lucía barely made it to the first floor before the man reached the stairs. Without stopping, they ran toward Teodora's apartment. Lucía banged desperately on the door.
"Teodora, let us in!" she exclaimed. The old woman opened the door just in time to let them in and closed it behind them. The boys leaned against the wall, panting, while Teodora watched them with a mixture of surprise and concern.
"What's going on?" she asked, locking it and looking down the hallway.
"The man from the top floor... he was in the basement." Lucía could barely speak between breaths.
"He saw the medallions on the door," Leo added, still agitated.
Teodora stood still for a moment, as if calculating something. Finally, she approached the boys and spoke in a firm tone.
"I told you to stay away from that door. Now he knows. He knows he's not alone in this."
"But... what is he looking for?" Leo asked. "What's behind that door?"
Teodora looked at them seriously.
"Something that should never have been found."
Before they could ask more questions, a loud knock on the door startled them.
"I know you're there!" the man's voice shouted from the other side.
Teodora pressed her lips together, pulled something from a nearby drawer, and headed for the door. It was the golden key she used the night before.
"You stay behind me," she ordered.
She carefully opened the door, leaving only a crack to look at the man.
"What do you want?" she asked with a calmness the boys hadn't expected.
The man seemed annoyed, but not surprised.
"I know you're behind this. That door... You know what's in there."
"And if you did, what would happen?" Teodora replied, unfazed.
"Don't get in my way," he warned, her tone heavy with threat.
Teodora stared at him for a few seconds before closing the door without another word. Then she turned to the boys.
"We have to move fast. He won't stop until he opens that door, and if he does, we don't know what will happen."
"But what's in there?" Lucía insisted.
Teodora sighed.
"A secret that's been buried for decades. And now, it seems you two are involved too."
The silence in Teodora's apartment was almost palpable after the confrontation with the man on the top floor. Lucía and Leo sat on the sofa, still catching their breath, while the old woman closed each latch and drew the curtains. Her movements were methodical, as if she had I'd waited for this moment for a long time.
Finally, he turned to them, the golden key still in his hand.
"Listen, children. What I'm about to tell you is something I shouldn't even share, but it's too late to back out now."
"What's behind that door?" Leo asked, straight to the point.
Teodora sighed and sat down across from them.
"I can't tell you everything, but what's there is something that shouldn't fall into the wrong hands. That man, whoever he is, isn't here by accident. I've been watching him for weeks, and I know he's after the same thing I've been trying to protect for years."
"Treasure?" Lucia chimed in, though her tone was more uncertain than excited.
Teodora shook her head slowly.
"It's not gold, nor jewels. It's something older, something that belongs to this building and its history."
Leo crossed his arms, clearly frustrated.
"But if you have the key, why don't you protect it better?" Why allow others even to get close?
Teodora gave her a stern look.
"Do you think I haven't tried? I have no control over everything. This building has its own secrets, and not all of them are under my care."
Lucía, calmer, spoke in a conciliatory tone.
"Why don't you just explain what's down there? If we're in danger, we need to know."
Teodora hesitated, but finally nodded.
"Fine. I'll tell them what I know."
"The Esmeralda Building was built over a hundred years ago, during a time of great instability in this city. The architects, according to the documents I could find, designed the basement to be a refuge, but not just any refuge. They wanted a place to hide something valuable, something many coveted."
Lucía leaned forward, intrigued.
"What?"
"An artifact," Teodora replied, lowering her voice as if afraid someone would overhear. "Something some believe has powers." I don't know if that's true, but what I do know is that many people have come after him over the years, and they've all ended badly.
Leo frowned.
"What kind of powers?"
"They say it can reveal hidden things: truths, secrets, even buried memories. But it's also said it can corrupt its possessor."
The atmosphere in the room grew heavier. Lucia felt a chill run down her spine.
"And why is it in the basement?" she asked.
"Because no one was supposed to find it," Teodora replied. "The architects sealed it there, trusting that future generations would protect it. But like all secrets, over time it attracted the wrong people."
Leo stood up abruptly.
"So, that man... wants to use it?"
"Probably," Teodora admitted. "And if he succeeds, we don't know what he might unleash."
Teodora looked at them carefully before continuing.
"There's a way to protect it, but I need your help."
"Our help?" Lucía asked, surprised.
The old woman nodded.
"I can't do this alone. We need to make sure he doesn't open that door. And if he does, we must act quickly to prevent him from taking what's there."
"And how do we do that?" Leo asked.
Teodora stood up and walked to a cabinet at the back of the room. She took out an old book with a worn leather cover. She opened it to a page marked with drawings of symbols similar to those they had seen on the door and the medallions.
"This book was left to me by my father, who also lived here. He was one of the last guardians of the building. According to his notes, there's an additional mechanism that can permanently seal the basement, but it can only be activated from the inside."
Lucía paled.
"From the inside? Does that mean someone has to get in?"
Teodora nodded, her expression grave.
"It's a risk, but we have no other choice."
Leo looked at his sister and then at the old woman.
"How do we activate it?"
Teodora pointed to the symbols in the book.
"The medallions are just the first key. But there are more clues in the building, like the ones you found. We need to collect them all to activate the mechanism."
Lucía hesitated for a moment, but finally sighed.
"Okay, we'll do it."
Leo smiled determinedly.
"What do we do first?"
Teodora closed the book and looked at them seriously.
"First, we must get ahead of that man. He'll also look for the other clues, but if we get them first, we'll have an advantage."
"Then there's no time to waste," Leo said, already standing and ready to leave.
However, just as they were preparing to leave the apartment, they heard a loud knock on the building's front door, followed by the disturbed voices of the neighbors.
"What's happening now?" Lucía asked, alarmed.
Teodora narrowed her eyes.
—Looks like our friend from the top floor is making his next move.
The knocking on the building's front door resounded loudly, accompanied by the confused voices of the neighbors. Lucía, Leo, and Teodora looked out of the apartment window to see what was happening. From their position, they could just make out the man from the top floor standing in the lobby. He was talking to the Martinezes, who looked annoyed.
"What's he doing now?" Leo asked, frowning.
Teodora slightly parted the curtain to get a better look.
"He's looking for something. He probably thinks someone in the building knows more than they let on."
Lucía tugged at her brother's sleeve, her voice a whisper.
"What if he suspects us?" Leo crossed his arms, thoughtful.
"It's very likely. Especially after what happened in the basement."
Teodora slammed the curtains shut.
"We can't stay here. If he suspects you have anything to do with the medallions, sooner or later he'll come looking for you."
"So what do we do?" Lucía asked.
Teodora went to the cabinet where she kept the book with the symbols. She took out a small wooden box, opened it, and revealed its contents: an old medallion that seemed to be part of the same set as those found in the lobby and stairwell.
"This is the last medallion. I kept it for years, hoping I wouldn't have to use it, but it seems we have no choice."
Leo took the medallion and examined it.
"So what do we do with this now?"
Teodora pointed to the open book on the table.
"According to my father's notes, these medallions are not only the key to opening the door, they also activate an additional mechanism that protects what's behind it."
"A mechanism?" Lucia repeated, intrigued.
"Something that will make it impossible for that door to open again, but only if we manage to get it working before he does."
Leo put the medallion in his pocket and nodded.
"Then we have to get back to the basement before he does."
"What if he's already there?" Lucia asked, crossing her arms in concern.
Teodora looked at them seriously.
"Then you'll have to distract him while I finish what I started."
Minutes later, the three descended into the basement, this time more cautiously. Lucía held a flashlight, while Leo carried the medallions and a screwdriver he had taken from his father's toolbox. Teodora, behind them, advanced with silent steps, carrying the book and the golden key.
When they reached the bottom of the stairs, the three stopped dead. The metal door was open.
"This isn't good," Lucía whispered.
Leo nodded, taking the medallions out of his pocket.
"If the door is already open, it means he's inside."
Teodora approached the entrance carefully, signaling the children to remain silent. From the other side of the door, a metallic sound could be heard: something like the squeak of a chain moving.
"He's looking for the mechanism," the old woman murmured.
"What do we do?" Lucía asked, clutching the flashlight tightly.
Teodora sighed and handed them both a page torn from the book.
"This is what you're looking for. The mechanism is hidden in a wall near the end of the tunnel. There's a panel with symbols identical to those on the medallions. When you find it, you must place the three medallions in the correct order."
Leo frowned.
"And how do we know which is the correct order?"
Teodora pointed to the drawing on the page.
"The order is based on the symbols: triangle, circle, and star. It's crucial that you get it right."
Lucía nodded, swallowing.
"And you?"
"I'll distract him," Teodora replied, with a determination that surprised them both.
"Are you sure?" Leo asked.
"I've taken care of this building all my life. I'm not going to let that man destroy it now."
As Teodora entered the tunnel to confront the man, Leo and Lucía silently slipped along the opposite wall. The place was larger than they imagined, with dark stone walls and a low ceiling that forced them to move crouching. Lucia's flashlight illuminated symbols etched on the walls, many of them identical to the triangle with the eye.
Finally, they found what they were looking for: a metal panel with three round indentations at the top, each marked with a symbol.
"It's here," Lucia whispered.
Leo took out the medallions and began placing them in the order indicated on the sheet: the triangle first, then the circle, and finally, the star.
When he placed the last medallion, a soft click echoed in the tunnel, followed by a low hum that shook the floor.
"I think it worked," Leo said, just as Teodora's scream interrupted them.
"Quick! Don't let him touch the artifact!"
Lucia turned and saw the man running toward them, his face marked with anger.
"Leo, hurry!" —he shouted, as they tried to block his advance.