Jason is a talented student and musician who posts his song videos online. Sophia systematically uses her position of spiritual authority to manipulate, stalk, and isolate Jason from his peers and family. It is soon revealed that "Sister Sophia" is actually , a completely unhinged imposter with a dark history and a fatal attraction. As Zoe tries frantically to warn the school administration, her claims are dismissed. The psychological tension rapidly escalates into physical danger, blackmail, and murder.