The drama tells the story of Yoo So-joon, who can travel through time by a subway. After seeing his future-self living miserably, Joon decides to marry Ma Rin in order to avoid that fate. As time passes, he learns to love her selflessly.

On a winter day, when a tiger escapes from the zoo, a man is kicked out of his girlfriend's house. Having no place to go, he wanders from here to there while working as a substitute driver and meets his old girlfriend.

Tae-jung, the part-time worker of a DVD room, hides drugs in room #7 in exchange for wiping out his debt. When he goes back to the room to retrieve the drugs, he realizes that the door is ...