Castle Freak

Castle Freak is a 1995 American horror film directed by Stuart Gordon, slightly based upon the short story The Outsider by H. P. Lovecraft. It was released direct to video onNovember 1995. The film contains elements of splatter and slasher films.citation needed

On the advice of the estates executor, the three plan to stay at the castle until they can liquidate the estate. Little do they know, however, that a horrible, freakish monster has been kept locked away in the basement. Unbeknownst to them, the duchess son, Giorgio Orsino, who was kept imprisoned and tortured by the duchess in revenge for her husband leaving her, still lives in the dungeons of the castle.Soon, the disfigured beast has escaped by means of breaking off his own thumb to get out of the manacles which bind him. The only reference to the H.P. Lovecraft story occurs when the monster beholds his hideous reflection in a mirror. He has emerged hungry for blood, leading to a series of unexplained deaths and disappearances including that of a prostitute John has picked up and brought to the castle after being rejected by his wife. ........

Source: Wikipedia