Sara Linton moved to Atlanta trying to leave her tragic past behind her. Now working as a doctor she is starting to piece her life together. But when a severely wounded young woman is brought into the emergency room, she finds herself drawn back into a world of terror. When Special Agent Will Trent returns to the scene of the accident, he stumbles on a torture chamber. Sara’s patient is just the first victim of a sick, sadistic killer. Wrestling the case away from the local police chief, Will and his partner Faith Mitchell find themselves at the centre of a grisly murder hunt. And Sara, Will and Faith are the only thing that stands between a madman and his next crime.