Arto is an attractive, emotionally detached ambulance paramedic living in Helsinki who avoids intimacy by engaging in a continuous cycle of casual, one-night stands. His strictly physical lifestyle is upended when he meets Hanna, a young woman who demands a genuine emotional commitment. For the first time, Arto attempts to build a stable, conventional relationship and moves in with her. However, his deep-seated fear of vulnerability soon resurfaces, triggering a destructive downward spiral. Seeking an escape from domestic life, Arto enters into a highly reckless, secret extramarital affair with Hanna’s best friend, Ilona, who is engaged to their mutual friend. This intense web of betrayal, hidden infidelity, and casual hookups systematically unravels their tight-knit social circle, forcing Arto to confront the severe consequences of his emotional void.