Sauna, songs, feast - the usual gatherings of an amateur choir at the dacha of one of the participants. However, the fun party ends in tragedy - early in the morning the body of the owner of the house with traces of a brutal murder is found on the seashore... ALL party participants are under suspicion, because the opportunity to commit Everyone had a crime. It’s more complicated - with a motive: who needed the death of the handsome man, the life of the party and a successful businessman Jukka Peltonen? At first, Maria Kallio, who was entrusted with the case, is at a loss: after all, she was familiar with the murdered man and his friends, and now the suspects do not accept her seriously.