What starts out as a harmless online prank takes a dark turn for 17-year-old Avery Lindstrom (Anne Winters (actress)) when her friends, Mandy Kim (Lauren Gaw) and Kaley Mack (Annalisa Cochrane), create a fake profile for an international dating website and begin to communicate with a lonely, socially inept computer programmer named John Bennett (Travis Hammer). Having lived a life of isolation and bullying, John becomes consumed by his desire for revenge after learning he was catfished by the girls. Doing some digging online, John finds that the photo of his nonexistent "girlfriend" was actually that of a deceased Filipina model, then uncovers the identities of the three girls who played him like a fool on their blog with their cruel prank. While both Avery and Mandy feel bad for what they did to him and show some remorse, Kaley doesn't, being the "mean girl" of their school.