FAST (Fugitive Active Search Team) goes after a charismatic and extremely dangerous triple murderer JP Sirén. It seems that the motive for his escape is revenge, and the team must locate Sirén’s next victim before he does. The case takes an unexpected turn, when during a nerve-racking hostage situation Karita’s colleague Niklas takes the hostage’s place. Karita and her team must ensure that Niklas makes it out alive.