House of 9 is a 2004 psychological horror film directed by Steven R. Monroe and starring Dennis Hopper and Kelly Brook. It follows nine strangers who have been abducted and locked inside a house. A mysterious voice called The Watcher (voiced by Jim Carter) tells them that they are to play a game: the last person alive can leave the house and win five million dollars. The film is presented with "live feeds" from hidden surveillance cameras, showing the nine people turning from cooperative escape attempts to a killing fest.

Plot

A young woman, Lea, is kidnapped and awakens in a mansion-like house. She leaves her room and finds other people who are still asleep. Attempting to flee, she finds that all of the exits are sealed and panics, resulting in her fainting. Lea is awakened by a priest, and finds that the other seven people have awoken too. A voice comes over a speaker announcing that they are to play a game. The voice states that they must kill one another until only one is left, after which the survivor will go free and be compensated with five million dollars.