In the privatized prisons of 2001, justice has long since been left behind behind bars. While a slave-like system operates within the walls, every new prisoner who ends up here is doomed to be crushed between the cogs of the system. Riki, a young fighter with superhuman strength, is determined to break this ruthless cycle created by corrupt prison administrators. Directed by Lam Nai-Choi, this action-horror hybrid completely shatters the modern perception of prisons. With its scenes of extreme violence and uncompromising visual style, the film presents the audience with a dark struggle for survival. The harshest and most uncompromising form of martial arts echoes relentlessly within these concrete walls.