The pigeon ritual

Leena's parents are cold and unloving, Matti's are just getting divorced. The two-year-olds spend a lot of time together, unaware that they have been under surveillance for a long time by a serial killer who has decided that they must die. While the killer prepares his sacrificial rituals, Inspector Harjunpää tries to track him down. He suspects that the man who was pushed in front of the metro at Helsinki Central Station was the first victim, and hopes that the surveillance videos have captured the perpetrator. But time is running out, the bomb is ticking.