One summer night in 2018, SOS receives a call about a lifeless person in central Örebro. When the police arrive at the scene, they find a dead man who has been subjected to mindless violence, stabbed with more than 25 stab wounds.

When a man is found shot in Baggeby on Lidingö, the police suspect that it was a brutal execution. With a massive police effort, the murder is traced to a large number of people - but who is the shooter?