The owner of a cheese factory fears communists and mistakes a meek youth who works for him for one of them. He invites him to his house to win his confidence and the youth falls in love with his daughter.
A cousin stays overnight at a couple's place as both of her parents are missing. The husband suspects that she is a vampire as he keeps seeing corpses and her biting into them in his nightmares. Suddenly he becomes a vampire and hell breaks loose and must find a way to put an end to this.
