A murder of a homeless man in downtown Pori. The victim was doused with gasoline and set on fire. A horrific act. The suspicion is immediately directed at a group of young people known for harassing helpless people. But would the rioters go so far as to kill a person in such a brutal way? The investigation into this delicate case is being carried out by Inspector Susanna Manner. The trail soon leads them into the world of the marginalized, into drug dens and forest camps, under bridges and into night shelters. And she sees her initial suspicions more and more confirmed: her own son may have been involved in the murder ...