House of the Long Shadows

House of the Long Shadows is a 1983 horrorparody film directed by Pete Walker. It is notable because four iconic horror film stars Vincent Price, Christopher Lee, Peter Cushing and John Carradine are together in one feature. The screenplay by Michael Armstrong is based on the 1913 novel Seven Keys to Baldpate by Earl Derr Biggers. The original music score was composed by Richard Harvey.

After much coaxing, the Grisbanes reveal that they are here to release their brother, Roderick, who was imprisoned in his room foryears because he seduced a village girl when he wasand killed her when he found out she was pregnant. When they go to release him, they find the room empty and conclude that he broke out recently by breaking the bars in front of the window. Moments later, Lord Grisbane has a fatal heart attack. As Magee talks about getting the police, screams are heard and they find Victoria strangled to death. When Corrigan, Magee, and Mary decide to leave, they discover all of their cars have slashed tires. Soon, Diane Louise English and Andrew Richard Hunter, a young couple who Magee met at the train station, arrive seeking shelter from the storm. They are soon killed when Diane washes her face with water that has been replaced by acid and Andrew drinks poisoned punch. The remaining five decide to find Roderick and kill him before he kills them.Magee, Sebastian, and Mary search a series of tunnels behind a bookcase. During their search, they get separated and Sebastian is hanged to death from the ceiling. Mary makes it back to Corrigan and Lionel while Magee remains lost in the tunnels. Corrigan soon reveals that he, in fact, is Roderick and that he escaped his prison decades ago, but returns every now and then to make them think he was still trapped. He then proceeds to kill Lionel with a battle axe and chase Mary throughout the manor. Magee soon finds them and, after the ensuing fight, knocks Roderick down the stairs during the fall, Roderick accidentally stabs himself with the axe. As Roderick is dying, his victims suddenly walk into the room, very much alive it is revealed that all was a joke put on by Magees publisher, even Roderick rises, his wound was also a fake. ........

Source: Wikipedia