The chair of the Malmo city council is found dead right on the Danish-Swedish border on the Øresund bridge between Copenhagen and Malmo - the corpse cut in half at the waistline. Detective Saga Norén of Malmo CID is applied to the case and soon learns that the lower half of the corpse belongs to a yet unknown Danish woman. She is forced to team up with her Danish colleague Martin Rohde, who is slightly irritated by her unusual manners. At the same time, Göran Söringer is brought to Copenhagen's Rigshospitalet to receive a heart transplant.

Knowing the killer has carefully planned his crimes, Saga and Martin wonder whether they can catch him off guard by doing something he doesn't expect.

A bus-load of children is kidnapped and are threatened to be killed. The police believe that the kidnapper is the killer, and the hunt continues.

Because the detectives suspect that a policeman is involved, a profile of the killer is developed and several police fit the profile and a search among them begins. The hunt continues and a particular suspect is found.