Doctor Williams is called in to examine the enigmatic Mr Voorman, a prisoner with a peculiar affliction: he believes he is a god. The Doctor must decide on the sanity of Mr Voorman - is he a faker or a lunatic? Diagnose him insane and they can ship him off to the asylum. But before making a decision, the Doctor has several questions in relation to Voorman's claims: why would a god choose to be straitjacketed in a prison, is there a way he can validate his boast and what has any of this got to do with Belgium?

The heroine is a mummy, possibly of an Egyptian princess or goddess, who in former times was executed for sacrilegous adultery and is now condemned to dusting this old house, which, like her and her mind, is falling apart .