A wife brutally slain. A life plunged into isolation. Struggling to regain any sort of human connection, he seeks comfort in the strangers that share his train to work. But when they too begin to vanish, he comes to the horrific realization that a sadistic maniac is determined to kill him and everyone he cares about. To stop the killing, he first needs to understand how the mind of this madman works. Descending into twisted thoughts of madness pushes him to the brink of insanity, but the body count only continues to rise. Will one man risk shattering his own reality to save those around him?