Dave Kroupa is shocked when his new girlfriend, Cari Farver, starts sending him demanding texts. When Dave ends the relationship, he finds himself on the receiving end of an onslaught of twisted messages from Cari, who has abruptly disappeared. Dave’s ex-girlfriend, Liz, also begins receiving harassing texts from Cari, resulting in a dangerous situation for them both. Meanwhile, Cari’s mother Nancy continually searches for her, keeping the pressure on the police who eventually uncover a shocking discovery.