John finds himself in the psychiatric ward of a hospital with amnesia. He is the chief suspect in a criminal investigation, an explosion at a local oil refinery. Doctors Crenvalt and Utterborg are charged with evaluating John's ability to answer questions that Detective Bonell has about the explosion. When John claims that he is from another planet, one doctor thinks he's lying to avoid prosecution; the other thinks he may be mentally ill. A nurse who lost her father in the refinery explosion is willing to risk everything to make sure that John doesn't get away with murder.