After a car accident, detective Michael Britten experiences two duelling realities, one where his wife was killed and another in which his son's life was claimed.

In one world, Michael tries to reconnect with his son; in another reality, Michael tries to understand his wife's grief; a clue in a case in one life crosses over to a case in the other, confusing Bird.

Detective Michael's two worlds spin out of control when escaped convict Cooper, a man Britten arrested 10 years ago, kidnaps his son Rex.

Detective Britten runs into Rex's former babysitter, Kate, during an investigation into an alleged suicide during an upscale yacht party.

Detective Britten suddenly becomes a suspect in his own case when an FBI agent, Santoro, questions his methods of tracking down a serial killer thought to be dead.

A hostage situation leads to detective Britten unexpectedly collaborating with Dr Lee; Bird is concerned over Britten's lack of sleep.