The new murder investigation is undertaken by David Jahn, a detective who is still emotionally overwhelmed by the death of his wife five months earlier.

Mittich takes an interest in the new case, but he is blocked from participating by the new senior detective, Matthias Grimmer, who insists on doing things his way, even when he is wrong.

A flashback shows the initial meeting of Pia's murderer, Danish national Peer Sommer, and his companion, a student named Timo.

The men form a bond as Sommer shares his collection of pornographic films, including one that shows the abuse of an adolescent girl, with Timo.

Jahn sets out with Gläser anyway, but he leaves her when he gets word that a suspicious man (Timo) has visited Pia's mother.

He hypothesizes that Sinikka's murder had been a signal from the other man, a lonely pedophile, that he wanted to reunite with his old friend.

The Guardian's Peter Bradshaw reviewed favourably the film writing "this icy, gripping police procedural thriller is easy to recommend for fans of The Killing, and indeed for anyone else, too".