Cassie, whose friend was tragically killed, seeks revenge on the perpetrator, Alex. Despite warnings from her friend, Cassie is determined to avenge the death. Alex ends up killing Cassie in a struggle. The incident is covered up, but Cassie's parents report her missing. Ryan, Cassie's ex-boyfriend, knows more than he lets on. At Alex's wedding, a shocking message from Cassie reveals more secrets. The wedding is interrupted by police sirens, hinting at the unraveling of the truth.