After a car accident, Detective Michael Britten discovers that he is living one life where his wife Hannah survived and he has a rookie partner named Vega, and dreaming another life where his son Rex lived instead and Michael works with his long-time partner, Bird. However, Michael isn't sure if he isn't dreaming his life with Hannah. Each day he alternates waking up in one reality or the other, and tries to cope with what may be his insanity.
Michael pursues two different cases in his different realities, both revolving around a dead man named Bernard MacKenzie. Meanwhile, he suggests that Hannah embrace some of her dead son's belongings rather than ignore them, which leads to a surprising discovery. And in the other reality, Michael discovers that his son has an unsuspected hobby.
When an escaped convict abducts Michael's son in one world, the detective is forced to negotiate with same man in his other reality, well aware that he is missing a memorial service to his son that his wife Hannah doesn't want him to avoid.
Cases in both realities reintroduce Michael to Rex's former babysitter Kate, whose life has taken two very different directions. Meanwhile, Michael tries to cope with his son's sudden anger outbursts when his friend breaks his tennis racquet.
Clues in one reality put Michael on the trial of a serial killer in the other reality. However, a FBI profiler believes that Michael knows more than he's telling. Meanwhile, Hannah contemplates a move to Oregon and when Michael learns of it, both of his psychologists warn that such an event could cause a schism in his realities.
In one reality, Michael deals with a schizophrenic patient who has taken a hospital hostage, and gets advice from Dr. Lee. However, the key to solving the standoff lies in the other reality, where Michael tries to cope with a hallucinatory penguin while looking for a ring with the clue he needs.
On the advice of a drivethru loudspeaker, Michael checks out the last case that he handled before the accident. Although the investigation turns up nothing, Michael becomes involved with the death of a construction worker whose body turns up entombed in cement. In the other reality, Michael and Bird work a case involving a young girl who had sex with a lab partner and then apparently killed herself.
While Michael prepares a couple for new life in the witness protection in one reality, he negotiates the introduction of his new partner to his old informant in the other.
When a Bowl game ends differently in Michael's two realities, he begins to understand how small events can have major consequences when two different crimes result. Meanwhile, Emma breaks up with Rex in one reality, while Vega plans a going-away party for Michael in the other.
Michael and Bird investigate a double-homicide at a tenement apartment, but soon discover that things aren't what they seem. In the other reality, Hannah and Michael talk to their dead son's girlfriend about their grandchild-to-be, and Vega prepares a goodbye party for his partner.
After passing out during a bungee jump in one reality, Michael discovers that he is trapped in the other reality with no way back. Worse, he becomes increasingly unable to distinguish reality from hallucination as a figment of his imagination stalks him.
-- Bohemian Rhapsody
Detective Ed Hawkins is the key to solving the accident in both realities. But when Michael is forced to kill him in on his reality, he must use his reality to crack the case in the other reality. However, Michael soon becomes a wanted man in both realities and he's unaware that the only person who can help him is one of the conspirators.
In one reality, Michael sits in a holding cell after his arrest for the attempted murder of the man who killed his family. In the other reality, he is offered a commendation for killing the same man. To escape in the first reality, Michael must speak to himself in the second... and resolve the situation with his family once and for all.
Songs: Youth Lagoon -- Montana