In one, a teacher sees a colleague carry discipline too far and mentions the act in the staff room, with startling consequences. In another, a party host, afraid of losing face, unwisely neglects an injury. Two parallel stories detail groupthink among young men and women respectively. Co-written with Östlund’s long-time producer Erik Hemmendorff, and inspired by personal experiences, Involuntary situates the viewer inside each social powder keg, where recognition and uneasy laughter coalesce.