What happens when a comedian known for his elastic face and manic energy disappears completely into the role of a legendary comedian known for his profound sadness? This compelling documentary pulls back the curtain on Jim Carrey's transformative and controversial performance as Andy Kaufman in Man on the Moon, using a treasure trove of never-before-seen behind-the-scenes footage. The film chronicles how Carrey, under the direction of Milos Forman, didn't just play Kaufman—he invited the chaotic spirit of the performance artist to inhabit him, creating an immersive and often bewildering experience for everyone on set, including co-stars Danny DeVito and Judd Hirsch.

Blending this startling archival material with present-day reflections from Carrey himself, the documentary explores the blurred lines between identity and performance, genius and madness. It presents a fascinating, sometimes uncomfortable, portrait of an artist chasing an authentic connection with his subject, raising questions about the cost of such total artistic surrender and where the actor ends and the character begins.