Once upon a time, there was a very rich family who lived in a big, fancy house called a mansion. The mansion was very old and had many rooms, each one filled with expensive furniture and decorations. The family was very proud of their mansion and loved to show it off to their friends and neighbors.

One day, strange things started happening in the mansion. First, a valuable painting went missing from the wall. The family searched high and low, but they couldn't find it anywhere. Then, one of the family members disappeared without a trace. The family was very worried and didn't know what to do.

The police were called to investigate, but they couldn't find any clues or suspects. The family was left feeling confused and scared. They didn't understand how these strange things could be happening in their own home.

As the days went by, more and more strange occurrences took place in the mansion. Doors would open and close on their own, and strange noises could be heard in the middle of the night. The family was starting to believe that their mansion was haunted!

Finally, the family decided to call in a group of detectives to help solve the mystery. The detectives searched every inch of the mansion and found a secret passage hidden behind a bookshelf. Inside, they found the missing painting and the missing family member, who had been hiding there the whole time!

It turned out that the family member had been trying to play a prank on the rest of the family, but it had gone too far. The family was relieved and happy to have their missing member back, and they were also relieved to know that their mansion wasn't haunted after all.

From that day on, the family made sure to always keep an eye on each other and to never play pranks that could cause such chaos again. The mansion was once again a peaceful and happy home, and the family could finally rest easy knowing that the mystery had been solved. The end.