When Sabrina picks up Adrien battered and bleeding outside Zagreb station, she knows only that she is drawn to this stranger and to the sense of danger he represents. She has no idea that she is also touching the Watcher, a mysterious figure who can inhabit Adrien's body using a brain implant. What might have been a love affair is abput to turn deadly for as Sabrina is drwan into Adrien's world, she will become the object of the Watchers desire in a battle over a metamorphic new tchnology known as I.