Dan Vasser, a San Francisco reporter, suddenly has the ability to travel across time and change the course of not only his own life, but the lives of others. As he travels through time, Dan must deal with the difficulties that his ability brings, from tension at home due to his sudden disappearances as well as strife at work. His travels bring him back together with his former fiance, Livia, which complicates things at home with his wife, Katie and their son.
Dan begins to wonder if he imagined his journeys and decides to get an MRI. Later, Dan and Katie try to have a romantic weekend, but Dan disappears during their flight when he is put back in time to deliver a baby.
Dan is taken back to the San Francisco earthquake where he tries to save everyone, but destiny seems to stop him at every turn. Katie is forced to take on Dan's news story in the present, while Livia discovers the truth about Dan's increasingly strained marriage.
Dan travels back to 1995, just as his wife, Katie was in the process of setting up a charity event. Dan meets up with Livia in 1995, it seems that he was brought back to help a woman on a blind date. Although Livia is suppose to be there to help him on his mission she seems more interested in Dan's relationship with Katie.
During a family outing, Dan finds himself alone with Zack when he feels a strong headache coming on. Dan travels back in time and begins tracking an ex-army ranger who hijacked a huge sum of money for a good cause. On the home front, Katie answers questions from the police after a robbery happens the night of her gala. Meanwhile, Dan entices Hugh with the prospect of getting a big break on a war story.
Dan's latest journey sends him to help two brothers scarred by their father's abuse. Jack begins to suspect that Dan has fallen back into his old gambling habits. During a trip to the past, Dan and Livia overhear an intimate conversation between Jack and Katie. Meanwhile, Dan learns a lesson about brotherly love.
Much to Dan's dislike, Katie considers going back to work as a television journalist. Dan travels back in time to protect a witness from certain death. Livia arrives just in time to save Dan's future.
Meanwhile, Jack continues to investigate his brothers mysterious behavior.
Dan journeys back into the past to a "key party" where he meets a young girl who will become involved in a deadly crime. Katie makes an interesting discovery about Livia's past. Dan and Jack get into a fight over an investigation involving Dan.
Dan travels back to the early 90’s where he seems to be tracking a serial kidnapper. Katie wonders what effects Dan’s disappearances are having on Zack when she is called into his school. Meanwhile, Jack remains skeptical, but begins to see evidence that Dan might be telling the truth about his travels.
The dangerous kidnapper Aeden Bennett is back and Dan learns a difficult lesson about what happens when he goes off-mission when he travels back to 1983 -- and discovers a young criminal in the making.
Meanwhile, Livia continues to uncover secrets about her purpose in life, and Katie gets into a deadly predicament when the kidnapper seeks revenge.
It's Christmas, a time for friends, a time for hope, a time for gifts, and a time for layoffs. Dan has an important mission this Christmas, and that is to save his job. Also Katie is still recovering from the after math of Aeden. Jack gets shocking news.
Dan's travels take him into an RV hanging off of a cliff just in time to save a mother and son. Katie's sister comes to visit and suspects Dan is having an affair. And when Dan returns to the present, he realizes how big the consequences can be when he accidentally leaves things in the past.
Dan travels into the past a few months before he started time-travelling, and ends up in an insane asylum with a man named Evan who claims he too is a time traveler. Livia arrives from past, being pulled out of time as she tries to deal with her upcoming marriage. As Livia and Dan try to reunite Evan with a lost love, Katie notices blood at home and starts to panic, and Jack pursues his investigation of Elliot Langley.