Fearing her boyfriend is cheating on her, Nicole tests him with a fake social media profile she's made under the name "Heather Harris." But when a girl named Heather Harris enrolls at her school, Nicole suspects something sinister.

Kate begins to suspect that Anna, the newly appointed captain of her cheer squad, is responsible for the death of Emma, but while Kate tries to find the truth, Anna is out to destroy her life.

Seduced by her boyfriend's charming son, a woman soon finds herself trapped in a dangerous obsession that will push her to her limits.