After spending six hundred years on earth, Seraphina Ames has seen it all. Eternal life provides her with the world’s riches, but at a very high price: innocent lives. Centuries ago, her boyfriend, Cyrus, discovered a method of alchemy that allows them to swap bodies with other humans, jumping from one vessel to the next, taking the human’s life in the process. No longer able to bear the guilt of what she’s done, Sera escapes from Cyrus and vows to never kill again.
Then sixteen-year-old Kailey Morgan gets into a horrific car accident right in front of her, and Sera accidentally takes over her body. For the first time, Sera finds herself enjoying the life of the person she’s inhabiting—and falls for the human boy who lives next door. But Cyrus will stop at nothing until she’s his again, and every moment she stays, she’s putting herself and the people she’s grown to care for in great danger. Will Sera have to give up the one thing that’s eluded her for centuries: true love?