Cube is a 1997 Canadian science fiction psychological horror film, directed and co-written by Vincenzo Natali. A man named Alderson awakens and finds himself in a cube-shaped room with a hatch in every wall, each of which leads to rooms identical except for their color. He enters an orange room and, without warning, is killed by a trap. In another such room, five people – Quentin, Worth, Holloway, Rennes, and Leaven – meet. None of them knows where they are or how they got there. Quentin informs the others that some rooms contain traps, which he learned by nearly being killed by one. Rennes assumes each trap is triggered by a motion detector and tests each room by throwing one of his boots in first. Leaven notices numbers inscribed in the passageways between rooms. Quentin, a policeman, recognizes Rennes as "the Wren", an escape artist renowned for getting out of jails. After declaring one room trap-free, Rennes enters and is sprayed with acid, killing him. The others realize that there are different kinds of detectors, and Quentin deduces that this trap was triggered by heat. Quentin believes each person has a reason for being there.