The secret of the beach bailiff

September 1845: Two horses pull a cart with few passengers through the foggy mudflats from Föhr to Amrum. They almost drove past the body of Busso Dahl, the postman. He was hit by a harpoon, beaten to death with an axe and pegged with wooden stakes in the mudflats. On the team is also the travel writer Georg Kohl, who wants to explore the island of Amrum. But the sight of the corpse in the mudflats does not let him go. And so he tries to find the murderer with the help of Dina Martensen and the stray Nickels. In the process they come across an old story and a dark secret and put themselves in danger.