A peculiar gang of disabled men have made the assisted living centre their home. Soon another attack takes place and a terminally ill woman, has no chance to escape from the killer's clutches.
The perpetrators turn out to be two women swindling money from lonely men. The women are not only driven by a lust for money but also their desire to take revenge on their victims for the humiliations they suffered in their previous lives.
The Violent Crimes Department is put in a tough spot when an unknown body turns up in the west side of Tampere. He had no chance of escaping the attacker because he was in a wheelchair.
Chief inspector Koskinen and his team start investigating this senseless series of crimes. It is not an easy assignment, and it also causes distress in the youth caught up in the situation.
The retired Roine gets interested in the case, finds the group behind the acts and gets captured by them. The group intends to execute the mayor of Tampere at the town hall square and live stream their declaration of war online.
The finger found in the library belongs to the mayor's brother. A headless body is found at the foot of the Mannerheim monument. The police receive a threat about five bombs having been armed around Tampere.
The body of a drowned man is dragged up from the Tammerkoski rapids. Although the man was found in Lake Näsijärvi, he was not drowned in lake water but well water, and the marks found on his wrists are determined to be caused by a rope.