"Calla Hammond has always been a loner-a product of the foster system and avoided by others because of a skin condition. When doctors discover her immune system holds the key to curing cancer, she struggles to advance lifesaving research in a world that sees her only as a means to an end. Yet along the way, Calla gains the one thing she has always longed for: a chosen family. When a group of unscrupulous people join forces to sell Calla's blood to the highest bidder, she digs deep to find the strength to retake control of her life, her body, and her story"-- Provided by publisher