So Joon owes his success as a CEO of a real estate agency to his ability to travel in time. He travels between the present and the future to satisfy his humble needs. Other than that, he doesn’t meddle with other people’s lives. One day, he saves Ma Rin from getting in a car accident. Why did he suddenly take interest in someone else’s life other than his?

So Joon can’t believe that he will be married to Ma Rin after three months. He tries to figure out why they’d get married by sticking around her. Ma Rin gets the wrong idea that So Joon must like her. So Joon keeps reminding himself that he should stay away from a strange woman like her, but at the same time, he feels sympathy towards her.

Ma Rin finds out that So Joon was the man who survived the subway accident with her seven years ago. So Joon discovers the secret behind the fate between himself and Ma Rin. Dae Shik suggests a possible solution that could shatter the ordained fate between them.

Ma Rin runs off to the hospital after getting a call saying So Joon got injured. When she shows up, So Joon asks her to live with him. From then on, So Joon starts aggressively proposing to Ma Rin.

So Joon and Ma Rin are a happy, newly-wed couple. Still, there are many things they don’t know about each other with how fast the relationship between them developed. Meanwhile, Ma Rin finds bunch of products from the future around the house and becomes curious.

Knowing how So Joon’s parents passed away, Ma Rin waits for So Joon to open up and share his feelings. However, So Joon is solely focused on tracking down the traces which his future himself left behind. When Ma Rin sees a magazine So Joon brought from the future, So Joon becomes anxious.

Ma Rin suspects there’s something So Joon is not telling her. The anxiety grows bigger when people around him knows him so well when she feels like she doesn’t know anything about him. She is even enraged when So Joon tells her that he is a time traveler because she thinks he is trying to fool her around.

So Joon makes up with Ma Rin and says that he wants to tell her about everything, but asks for her patience since now is not the right time. When Ma Rin returns from the hospital, So Joon promises her that he’ll treat her ever so carefully, which makes Ma Rin impatient.

As Doo Shik tries to separate Yong Jin and So Joon, So Joon grows suspicious of Doo Shik’s strange behaviors. Thinking Doo Shik is up to something, So Joon travels time to find out horrible truth. In order to prevent from the horrible accident from happening, he decides to tell Ma Rin the truth about himself.

It’s hard for Ma Rin to admit, but with the series of events that took place in the past, she has no choice but to accept the fact that her husband is a time traveler. Feeling compelled to tell Ma Rin a little bit about the future, So Joon tells her that something bad will happen in the near future and that he will do everything to stop it from taking place.

So Joon still can’t seem to find the reason what really happened to Sung Kyu. As he tries finding out what really happened by going back and forth the future, Ma Rin wants him to stop because she is worried about him. But as So Joon continues, he learns that what really changed was his own fate.

Ma Rin packs her things and leaves So Joon to go stay at So Ri’s house. Although their relationship has taken a drastic turn, Ma Rin drops by So Joon’s house and waits for his calls as she believes they can reconcile. Despite that, So Joon chooses to be cold to her which makes him feel tortured.

As So Joon promises Ma Rin that he will never travel back and forth the time, Ma Rin finds out that So Joon had actually been very helpful to Ki Doong while he traveled back and forth the time. Though Ma Rin doesn’t want So Joon to travel time anymore, she is a bit intrigued by the future items and news. Meanwhile, Yong Jin completely loses control over himself and falls deep into the mire.

Yong Jin sees So Joon vanishing into thin air while riding the subway. After that, Yong Jin goes to Ma Rin’s house and tells her what he saw. When he leaves, Ma Rin and So Joon talk about how there is no way he’d know how So Joon is a time traveler. Little do they know, Yong Jin is listening to their conversation over the bug he planted when he was at their house.

As Ma Rin is kidnapped by Yong Jin, So Joon comes up with a plan that will only save Ma Rin. He sends Doo Shik to save Ma Rin, and he heads to the station to face Yong Jin. Knowing what So Joon is up to, Ki Doong also brings police officers to the station and they were able to catch Yong Jin red handed. But what will happen to So Joon who is hurt?

So Joon chooses to be stabbed by Yong Jin to save Ma Rin taken hostage and goes to the future getting his wound treated. When So Joon comes to his senses after being trapped in a coma for two years, he finds out Ma Rin is already dead. He is determined to go back to the past to meet her, but he seems to lose his ability for time traveling. Can So Joon save Ma Rin again?