Guards and inmates in a maximum security prison have to fight for survival when they become trapped inside with demonic beast that begins preying on them. Together they must find a way to uncover the supernatural secret behind the beast.

Inmates and guards alike become trapped in a maximum security prison when they fall prey to a demonic beast that feeds on human flesh. As the creature's power multiplies with every kill, their only chance for survival is to uncover the ancient mystery that holds the power of the shapeshifter.—Anonymous