After spending six hundred years on Earth, Seraphina Ames' eternal life provides her with the world's riches, but at a very high price. Centuries ago her boyfriend, Cyrus, discovered a method of alchemy that allows them to take the bodies of other humans by jumping from one vessel to the next, ending 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. But then...