Iboga is a West African psychedelic plant used for generations in Bwiti religious ceremonies, and in the early 2000s it develops a reputation in the West as a fast cure for heroin and opiate addiction. Filmmaker David Graham Scott follows a group of addicts through an all-night detox session, sitting with them as iboga practitioners guide them through hours of hallucination meant to break the physical grip of withdrawal. The tone shifts when one client collapses during treatment and ends up on life support, and the practitioner who administered the dose is jailed, forcing Scott to confront how little oversight exists around a substance being handed out like medicine. He keeps filming anyway, tracking the argument between people who credit iboga with saving their lives and the evidence that it can kill. The film closes with Scott undergoing the treatment himself in London, administering it under conditions he can control after everything he has just seen go wrong. It is less an endorsement than a record of a genuine gamble.