The Knife (2025) Plot Summary & Ending Explained

The film closes on the aftermath of the night when an unknown woman breaks into Chris and Alex’s home. Chris, disoriented after drinking beer and a mix of pills, manages to subdue the intruder but can’t remember the exact details, and Alex, terrified that their story will look suspicious, takes a knife lying on the floor and places it in the woman’s hand to make it seem like she was armed.

When the police arrive, the case is led by Detective Carlsen, an older white officer who quickly senses inconsistencies. She interrogates each family member in turn, subtly twisting the environment to isolate them: she pretends the mother is present while questioning the son, separates the crying infant from its mother, and even ignores a child’s asthma attack to keep the pressure on. Through these tactics she extracts a confession that the family had “tampered” with the scene, despite the fact that the intruder is still alive and merely an addict who stumbled into their house.