The next day, her boyfriend, Julian, is implicated in a brutal killing.Seven years later, a freak occurrence gives Cassie the ability to travel through time without altering it. Revisiting Julian in the past has her falling in love all over again. Convinced of his innocence, she goes back to witness the murder and the events leading up to it. Afterward, she struggles to find a way to prove what really happened, while the killer stalks her past and present lives, determined to silence her.