Lee Palmer has just recovered from a rare disorder akin to agoraphobia but instead of fearing open spaces, she's scared of distance between herself and other objects. The condition is only eased by her closeness to walls. With a fresh start in a quiet, isolated house husband Nick believes she's cured but their peace is soon shattered when Lee is haunted by intense visions of her past and it appears her bizarre phobia has returned. Suddenly their house becomes a spiritual battleground, as evil forces gather to torture Lee during a night of unadulterated terror. But are these evil forces real or inside her head and why does she believe they may not be so uninvited after all?