Hadley Jamison doesn't know what to think when she hears that her classmate, Archer Morales, committed suicide. She didn't exactly know him, but that doesn't stop her from feeling like there was something she could have done to help him. So to Hadley's surprise, on the very night of Archer's funeral, she has a run in with Death himself and is offered the chance to go back in time to stop Archer from ending his life. The catch? She only has twenty-seven days to do it. And if Hadley doesn't succeed? Well, she doesn't want to think about that.

Vera Collins has faced a number of hardships throughout her life. Being born with a heart defect was only one problem in her life. She loses her twin sister Harper in a plane crash that was headed to the Californian countryside, and she can't help but to think it was her fault. She also inherits something very important of her sister's and she just doesn't understand why she lived. When finally getting a chance to actually go to California, she meets a mysterious guy that completely confuses her. What is it that he's after? And more importantly, what does he really want with Vera?