Darius and his little sister Amelia were inseparable. They loved going on adventures together, exploring the world around them. One day, while playing in the backyard, they stumbled upon an old treasure chest hidden behind a bush.

"Look, Amelia!" exclaimed Darius. "I wonder what's inside." Carefully, they opened the chest and discovered a glittering array of gems and gold coins. The siblings were thrilled by their unexpected discovery.

Darius and Amelia ran inside to show their parents the treasure. But when they returned to the spot, the chest was gone! "Where did it go?" cried Amelia, her eyes wide with confusion.

Darius and Amelia looked everywhere, but the treasure had vanished without a trace. They decided to investigate the mystery and find out what happened to their valuable discovery.

The two siblings searched high and low, asking their neighbors if they had seen anything. Finally, they spotted a strange-looking man sneaking away with the treasure chest. "Hey, stop!" yelled Darius, and the two children gave chase.