Jenna Jenkins was getting married to her long-term boyfriend, Adam, and she was sure her life was all coming together. Until Adam left her for a twenty-three-year-old yoga instructor. To ease the pain, Jenna threw herself into her teenage memories of the late, great Tommy Seer, killed when his car crashed off a bridge in 1987, when she was just twelve, and focusing on the man who has been - and always will be - the true love of her life, however worrying that may seem to her best friend, Aimee.

One day, working late, or thinking about Tommy at her office after dark, a freak accident sends Jenna back to 1987. It's a few short months before Tommy will die and Jenna's job is apparently working as his assistant. But Tommy is not the guy she imagined. He's mean and rude and obnoxious. But he is still deliciously good-looking. When Tommy takes her into his confidence, she starts to see the real him beneath the image and finds herself more in love than ever. He suspects someone is trying to kill him - and she knows it won't be long before they succeed. Why is she here? Is she meant to save his life? But how can she without revealing the bizarre, unbelievable truth?