Catherine receives a mysterious text from her friend Jaslene who disappeared over a year ago. As Catherine investigates, she receives more texts revealing secrets about Jaslene's past. Each text comes with a mission for Catherine that, if failed, results in harm to a loved one. Catherine's ex-boyfriend Chris, who was violent towards Jaslene, becomes a suspect. At a high school party, the story of Jaslene's disappearance is revealed, with her step-brother and ex-boyfriend Chris revealed to be the killers due to Jaslene's manipulative behavior.