Tom, the bravest among the group, was the first to approach the menacing structure. His heart pounded like a drum as he peered up at the mysterious door.

Lilly, not one to be left behind, joined Tom. The sight of the door, hanging three floors high with no visible way to reach it, made her heart flutter with excitement.

Jack, the brain of the group, suggested using a ladder from the nearby shed. But the mystery wasn't about reaching the door, it was about how to open it.

They all agreed and fetched the ladder. As Tom climbed up, his hand brushed against a loose brick. To his surprise, it triggered a mechanism and the door creaked open.

They entered, their hearts pounding in anticipation. The inside was even more daunting - an endless labyrinth of dark corridors, each one leading to a different mystery.

As they ventured deeper into the house, they found strange symbols etched into the walls. Jack, having a keen interest in history, recognized them as ancient codes.

Their eyes widened at the sight. They had stumbled upon a long-lost treasure. But their joy was short-lived as the door slammed shut behind them, trapping them inside.

They panicked, but Jack, calm as ever, noticed another set of codes on the door. He quickly deciphered it, unlocking the door and freeing them from the chamber.

They decided it was time to leave. As they exited the house, they realized the sun was rising, casting a golden glow on the once dark house.

They looked back at the house one last time. It was no longer a mystery, but a testament to their bravery and wit.

They returned home, carrying the memory of their adventure. The dark house was a mystery no more, but it would forever remain a symbol of their courage.

And so, the friends went on with their lives, their bond stronger than ever. The dark house, once a mystery, now stood as a beacon of their friendship.