Loving someone madly, obsessively, to the point of addiction can be heaven ... or hell.

The year is 2165. A new blood group has evolved, and biological pairing, called mating, has replaced the old-world marriage ritual. When a stranger saves astronomer Dr. Fraya Riber from drowning, her body goes into a strange state of arousal. Bound to be paired with another, Fraya frantically searches for the answers to the phenomenon that soon becomes an unwelcome addiction. Nothing has prepared her for this painful dependence, and nothing will prepare her for the cure, or the identity of her enigmatic savior.

Can she reject desire for loyalty? Must she choose between her career and her love? Can passion truly craft a bond that will last a lifetime?