In 1997, a 23-year-old Frenchman named Frederic Bourdin convinced a family in San Antonio, Texas that he was their son Nicholas Barclay, missing for three years. Bourdin, a serial impostor with a long history of assuming false identities, dyed his hair, altered his story to explain his accent and different eye color, and moved into the family's home. Director Bart Layton mixes interviews with Bourdin himself, chillingly candid about his methods, with the Barclay family and the FBI agent and private investigator who eventually grew suspicious, plus reenactments that blur into the interview footage rather than illustrating it safely. The film builds toward the darker question underneath the con: why a grieving family would accept an obvious stranger as their child, and what that need might have been covering up. Bourdin's own charisma on camera is unsettling by design. The case remains legally unresolved, and the film ends less certain about the truth than when it started.