Catherine meets Nick by accident and, after a whirlwind romance, the two get married and Catherine moves into Nick's apartment only that's the start of problems when an unseen intruder begins playing strange mind games with Catherine in an apparent attempt to drive her insane.

Catherine meets Nick by accident and, after a whirlwind romance, the two get married and Catherine moves into Nick's apartment only that's the start of problems when an unseen intruder begins playing strange mind games with Catherine in an apparent attempt to drive her insane.