Plod noci / Nightbreed (1990)(CZ)

A masked serial-killer is slaughtering families. Meanwhile, the youngster Aaron Boone has nightmares with monsters in a place called Midian. He has therapy with the psychiatric Dr. Philip K. Decker and his girlfriend Lori Winston wants to travel on vacation with him. When Aaron visits Dr. Decker for a session, the doctor convinces him that he is a serial-killer and asks Aaron to turn himself in to the police. He also gives a medication to calm him down. However it is indeed a hallucinogen and Aaron is hit by a truck. He awakes in a hospital where he shares a room with the insane Narcisse. When he overhears the man talking about Midian, Aaron learns the direction to reach the place. He heads to the place and finds that Midian is a cemetery. Further, there are monsters hidden from the humans in the underground and is bitten by Peloquin. Aaron flees from the monsters and finds Dr. Decker, Detective Joyce and a team of police officers waiting for him outside the cemetery. Decker lies and yells that Aaron has a gun and he is murdered by the police. However the bite revives him and he goes to Midian, where he joins a society of monsters hidden in the underground. Meanwhile Lori is seeking him out while Decker wants to destroy the ancient bred of monsters.