Martin (1977)

George A. Romero does for vampires what he has already done for zombies: an intense and realistic treatment that follows the exploits of Martin, who claims to be 84 years old and who certainly drinks human blood.

The boy arrives in Braddock, Pennsylvania to stay with his uncle, who promises to both save Martin's soul and then destroy him once he is finished, but Martin's loneliness finds other means of release.