Loosely based on the Sala gang, a group of five people that committed murders and thefts in Sweden in the 1930s.

A famous industrialist is murdered at a restaurant in Malmoe. Police inspector Martin Beck in Stockholm gets the case. The suspects lead to people involved in illegal arms deals. But who was the biggest criminal, the murderer or the industrialist?

A lifeboat floats ashore at the coast of Skåne. Inside are two dead men who who've been murdered. Policeman Kurt Wallander is assigned to the case. The men are identified with the help of the police in Latvia. One of their officers travel to Sweden to to help but when he returns to his home country he is mysteriously murdered. Kurt flies to Riga to find out why and is drawn into complex conspiracy.

Carl Hamilton (Coq Rouge, Swedens James Bond) is called before KU (Swedens answer to the American congressional hearing) to answer questions about a spy war between Sweden and the Soviet Union.