Thomas, Dakarai, and Karl live together in the charming city of Lübeck. On a sunny day, they decide to visit the harbor, a place steeped in history and mystery. While strolling along the docks, they stumble upon a mysterious bag hidden behind a stack of crates. To their surprise, the bag is filled with glittering jewels, immediately raising questions about its authenticity and origin. Who could have left such a valuable thing behind, and for what purpose? The three friends embark on an exciting and dangerous quest to answer these questions. Their determination leads them through unexpected twists and adventures, where they must be wary of the dangers that lurk.