After being accused of a crime she didn't commit, heartbroken bad-girl Heidi gets stuck in detention with school geek Saffron and sparks fly. After a messy breakup, Heidi swears off dating and vows to get revenge on everyone that's crossed her. But when she finds herself stuck on detention with goodie-two-shoes Saffron, Heidi's forced to risk getting hurt again, or cut herself off from her friends forever.