Gunn's film maudit was the most ambitious 'black movie' of its day and a milestone for indie film-making in the US. Opening captions explain that academic Dr Hess Green (Jones, Night of the Living Dead) has been invulnerable and addicted to blood since being stabbed (in a parody of Catholic dogma) with a dagger from 'the ancient Black civilisation of Myrthia'. Affluent and (thanks to discreet raids on a local blood-bank) comfortable, he avoids murdering for sustenance until stuck with a new assistant (Gunn), who turns out to be a suicidal alcoholic. Deliberately fragmented and punctuated with disquieting cutaways to art works, the film charts his growing sense that he is afflicted with a curse, across his marriage to his assistant's widow Ganja (Clark) and his provision of a stud-victim to feed her 'hunger'. Theological musings jostle with sexual-visceral imagery in a mix which is still very potent.