The Act of Killing is a movie by Werner Herzog and Errol Morris about a group of Indonesian mass murderers. 

In The Act of Killing, Anwar and his friends agree to tell us the story of the killings. But their idea of being in a movie is not to provide testimony for a documentary: they want to star in the kind of films they most love from their days scalping tickets at the cinemas. We seize this opportunity to expose how a regime that was founded on crimes against humanity, yet has never been held accountable, would project itself into history.

And so we challenge Anwar and his friends to develop fiction scenes about their experience of the killings, adapted to their favorite film genres – gangster, western, musical. They write the scripts. They play themselves. And they play their victims.