James Henry Kinmel Sangster (2 December 1927 – 19 August 2011) was a Welsh screenwriter and film director, best known for his work on the initial horror films made by Hammer Film Productions, including The Curse of Frankenstein (1957) and Dracula (1958).
A group of strangers become trapped in a stalled elevator, and as tensions rise, they realize one of them may be the devil in disguise. As each person’s past sins come to light, the survivors must uncover the truth before they are all claimed.