Once upon a time in an ancient castle turned luxury hotel, a mysterious murder happened. It was a dark and stormy night, and everyone was talking about the spooky secrets of the castle.

Viktor, the owner of the castle, was a rich and charming businessman. Anna, a clever detective, arrived to investigate the murder, and Tom, the local police captain, was also Viktor's friend. They all gathered in the grand hall to discuss the crime.

Viktor's huge and friendly Bernese mountain dog, Max, suddenly found a crucial clue—a torn piece of fabric hidden in the garden. The three friends were excited and followed Max as he led them to an old tower.

As they climbed the tower, they stumbled upon a hidden room filled with ancient artifacts and a secret passage. The friends were amazed and thrilled to explore the hidden chamber, wondering what other secrets the castle held.

After searching the hidden room, they found a hidden diary belonging to the castle's former owner. The diary revealed shocking secrets about the castle's history, including a long-lost treasure and a tragic love story.

The friends pieced together the clues from the diary and Max's findings. They realized that the murderer was after the long-lost treasure and had tried to frame Viktor for the crime. With their clever detective work, they finally caught the culprit!

The castle was no longer filled with dark secrets, and the friends celebrated by having a joyful party in the grand hall. Max was the hero of the day, getting all the cuddles and treats, while Viktor, Anna, and Tom became the best of friends.