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.

Rolf Spiekermann macht mit seiner Familie Urlaub auf Amrum. Kurz nach Ankunft, wird er Opfer eines Überfalls und kommt nur knapp davon. Hat der Überfall etwas mit seiner Arbeit als Kommissar zu tun, bei der er sich viele Feinde in der Hamburger Unterwelt geschaffen hat?