A young Halloween buff accidentally downloads recently deceased stand-up comic, who ends up helping her foil two bumbling crooks, as well as finishing her haunted house.

Mary is a horror-movie junkie whose obsession is out of control, leading her over-protective father to ban her from seeing scary flicks. But when she and her friends sneak out to see a film called The Wisher, its creepy antagonist seems to escape into her life and make her darkest desires come true.