Mia Lockhart has a secret. Her mother was a keeper, as was her grandmother - women who were warriors, healers and protectors. And when a mysterious man enters her life, she puts this to the test. Adrian Ashton is a brilliant scientist - and a killer. With the aid of an ancient Chinese text, he has mastered the art of capturing the chi of his opponents -the vital energy that flows through their bodies. Mia finds herself drawn to his dark genius. But when he targets the man with whom she is falling in love, she is forced to choose between them. Soon it becomes a fight to the death in which love is both the greatest weakness - and the greatest prize.