Delaney Moss should have died. She was supposed to die.


She never expected, after years of waiting, to receive a heart transplant. Now, seventeen-year-old Delaney doesn t know what to do with her life. So Delaney latches onto the one thing that gives her meaning- learning as much as she can about the person whose heart she inherited.


After some sleuthing, Delaney concludes her heart donor was a girl her age, Mia, who died tragically one town over. Delaney tells herself that attending a post-mortem birthday celebration for Mia will help her fully know who Mia was. And she s sure that after the memorial, she will be able to move on with her life. But then she meets Clayton- a boy who makes her new heart race; a boy whose grief and outlook resonate with her, and a boy who, it turns out, was Mia s best friend. Suddenly Delaney is more drawn to Mia than ever..