Inspector Rolf Spiekermann is committed and successful, but has many enemies in Hamburg's underworld and little time for his family. That's why his wife Elke and the children are looking forward to vacationing together in Amrum. Arriving on the idyllic island, Rolf falls victim to a treacherous attack. With the help of the young hitchhiker Olaf, he gets off lightly. Rolf feels at the mercy of an invisible opponent. Because the local police only investigates half-heartedly, he tries to find the perpetrators himself. But inspector Spiekermann has found that all his professional skills cannot help him.

The young Friedrich Freiherr von Kuhlbanz died almost 300 years ago, but he is cursed beyond death. "I will not rot in my grave if I have committed the murder of the shepherd Dühn", the squire once swore and became a legend as the mummy of Roggelin. One night, Maja meets the ghost of Friedrich in the crypt. And with his sad story, he is able to win her over to help him. Maja is determined to prove Friedrich's innocence.

Now Balthasar, the true murderer of the shepherd, has had to take the place of his brother Friedrich in the glass coffin of the crypt. Thus Friedrich Freiherr von Kuhlbanz has finally found peace in the shadow realm. But Maja is still looking for a way to him and sticks to her love for Friedrich. Apparently, however, Balthasar wants to use her longing to satisfy his thirst for revenge on von Kuhlbanz. A victim and black magic come just at the right time with his diabolical plan.

9-year-old Friedrich surprises a burglar.