Sisu 2 picks up where the original film left off, continuing the story of Aatami Korpi, portrayed by Jorma Tommaila. After the brutal events of the first film, Aatami has found a semblance of peace in the Finnish wilderness. However, his newfound tranquility is shattered when a fresh threat emerges, forcing him to confront a new wave of ruthless adversaries. This time, Aatami must protect not just himself but also a community that has come to rely on his strength and resilience.