No crying allowed. At least not in the north... East Frisia, Neuharlingersiel, in summer: On an unusually warm day, teacher Rosa discovers a lonely seal pup on the beach. When she goes to get help for the baby seal, she encounters not the veterinarian, but her husband. He is lying in a pool of blood. And he is quite dead. It turns out that the retired chief physician of the children's clinic has been shot. With a Russian Makarov. The Wittmund criminal police therefore suspect a contract killing, but Rosa and her friends - village policeman Rudi and postman Henner - think that's pretty ridiculous. Taking matters into their own hands and using their very special methods, the three begin their investigation. They stumble upon portable toilets, expensive riding lessons, and love affairs that clearly didn't go as smoothly as one might think...