They've loved each other in a thousand lifetimes. They've killed each other in every one.

Evelyn remembers all her past lives. She also remembers that in every single one, she’s been murdered before her eighteenth birthday by Arden, a supernatural being whose soul—and survival—is tethered to hers.

The problem is that she’s quite fond of the life she’s in now, and her little sister needs her for bone marrow transplants in order to stay alive. If Evelyn wants to save her sister, she’ll have to:

1. Find the centuries-old devil who hunts her through each life—before they find her first.
2. Figure out why she’s being hunted and finally break their curse.
3. Try not to fall in love.