For Allison Cook, the weekend trip to a horror convention in Virginia is a fun break from work and humdrum reality. Then she meets a guy who shows her a movie that shouldn't exist, one that upends everything she thinks she knows about reality itself. The movie on the old VHS tape is an unseen and unknown installment of a legendary slasher franchise she's loved since the dark days of her unhappy adolescence. As soon as she sees it, she knows the movie is the real deal, not a fake or a fan film. She can only come to one impossible conclusion-the movie is from some other alternate reality. It is not of this world. And she knows one other thing. She must have it. At all costs. And by any means necessary. But unknown to Allison, possession of the tape comes at a higher price than she ever could have imagined.