suburban housewife Grace Lawson collects some pictures at the local Photomat; inexplicably, one is an old print depicting her husband, Jack, with other college students; when Grace shows the photo to Jack, he drives away-and disappears. Grace's hunt for her missing husband, whom we learn has been kidnapped sweeps her back into a nightmare she thought she'd escaped: the evening years ago when she survived a rock concert rampage, occasioned by a shooting that left many dead.