Three couples arrive at a Brooklyn artist’s studio expecting individual sessions with their psychologist. Instead, they discover their therapist left behind a letter and a series of sealed envelopes instructing them to conduct their own unconventional group therapy session, which quickly spirals into an increasingly volatile confrontation as long-buried secrets, betrayals and uncomfortable truths come to light. As the partners turn on one another and their relationships begin to unravel, the session builds toward a series of revelations that challenge everything they thought they knew about each other.