A dentist extracts all his rival's teeth and replaces them with dog's teeth - turning the man into a werewolf. After going on a rampage, the beast is caught and the teeth are removed again, rendering the man harmless. Only now the doctor got bitten and turns werewolf.
"The despicable crime of grave robbing brought a great share of wealth to young Pietro Vagas, an unscrupulous grave digger of the nineteenth century..." One night Vagas opens the grave of a strange man and gets robbed himself - of his soul, by the devil.
Suicidal newspaper reporter Elliot Burke has written his own obituary already when he meets a man with a magic mirror foretelling the future. Burke is able to get some scoops, but he gets careless and that obituary comes in handy after all.
A potion of super-human strength changes timid Dr. Lorch into an primordial cave-man hunting for flesh and killing people in his way. In the end Dr. Lorch finds his master in confronting a circus gorilla. The potion is destroyed.