When a group of people from different walks of life converge in a Hungarian castle situated in Budapest which has been sealed for 500 years, they bring with them a werewolf which slowly begins to cut their numbers down.

In New York, people are slain and strangled to death brutally on the open street. All witnesses agree that the murderer was in a cop’s uniform. Soon the police searches and finds a suspect in its own ranks: Jack Forrest, turned in by his own wife. To prove his innocence, he has to investigate on his own.