Seven people awake to find themselves in a cube-shaped room, with no memory of how they came to be there or of each other. Traped within the Cube, a grid of identical cubic rooms, the strangers struggle to understand the purpose of this enigmatic construction and its builders and to solve the puzzle that will lead them to the exit. As the group explores, they must contend with the dangers posed by their prison, rooms that hold traps, of a variety of lethal designs. Each member seems to have a skill needed to survive, but as the traps take their victims the chances for survival grow slimmer, and the group itsself becomes a threat, as the members grow suspicious that one of their number may be a traitor working for the architects of the cube.