The streets of Zagreb are empty because of a rumored vampire who attacks lonely women. To the office of psychiatrist, Franjo Glogowetz, there arrives a strange visitor, Teobald Majer. He is convinced that he is a vampire from the 16th century, and tells Franz that the members of his family, Glogovac, were famous vampire hunters. Naturally, Franz does not take him seriously but his wife, Barbara, likes the stranger a lot and even believes his story. In the meantime, Franz's two relatives, Jambrek and Jurek, arrive and get caught up in the mess.
The story is set in a small Dalmatian town. Soon after the death of a local nobleman, a girl who worked as a servant in his house, gets pregnant. Even though the father's identity remains unknown, the whole neighborhood saw a naked man jumping down from her window on that same night when the nobleman died. Local teacher who lives in that house, falls in love with the girl who decides to tell him the truth about the "naked man".
The movie is based on true events that occured in Croatian city of Karlovac in 1941. In order to save the imprisoned high ranking member of the resistance movement, the group of Partizans are conducting daring raid in the very center of the enemy stronghold.
