The alchemy of forever

Seraphina Ames has lived six hundred years due to a method of alchemy, discovered by her boyfriend Cyrus, that allows them to swap bodies with other humans, taking their lives in the process. After vowing to stop killing, Sera accidentally takes over the body of a sixteen-year-old girl who was in a car crash. Sera loves her new life and falls for a guy, but Cyrus threatens everything.