In complete disregard for the superstitious villagers' warnings, curious Dr Garondet arrives at the feared Professor Orloff's ancestral castle to handle a medical emergency. And not knowing who sent for him, the clueless physician meanders through the tower's corridors, looking for the host. Instead, Dr Garondet soon realises he's not welcome there. Without a doubt, something strange is going on in the creepy castle; people say the insane scientist has secretly created an invisible, blood-thirsty abomination kept under lock and key. However, the monstrous creature has escaped confinement, threatening the castle's unprotected women. As the unwanted doctor dices with death to fight the unseen predator, can he keep mad Orloff's troubled daughter Cécile out of harm's way?
—Nick Riganas