In 1988 Jens Michael Schau killed his life companion of thirteen years in a jealousy fit. Schau was sentenced to ten years in prison and served his time in a psychiatric hospital. He was released after seven years. Today he lives an isolated life forever punishing himself for what he did. The film evolves around the question: How do you live with having done something unforgivable? "I never know if people will greet me or not when I meet them in the street. That is my cross to bear. You're convicted and you serve your time, and in theory you are free. But of course you aren't really free. " Jens Michael Schau says in the film. WHAT HE DID is a Coming Out Story about love and jealousy told through inventive interactions between film and theatre. Observational documentary is mixed with fiction as acclaimed theatre Mungo Park examines and reconstructs the events that came to a fatal end.