A gang of five children spend their summer in an abandoned factory complex. When they are forbidden to go there by the factory owner for safety reasons, the children decide to ignore the ban. This decision changes their lives forever and the friends face a grim confrontation.

Former mafia boss Mart wants to live a quiet life with his family in a country home. He is not allowed that luxury. He decides to ask for help from Ahto, who has founded a detective agency. Once again, cooperation with the police is started in order to jointly expose the criminal group.