One whole two halves ....one good, one bad, like the day and night.

Two worlds with different scenarios but same people, two opposites that apparently have nothing in common. As good as a person is in one world as bad he turns in the other.

But there is something that connects the 2 halves. If one dies, the other will have the same faith after one year.

Luhan and Hun live in the opposite world, where Hun is a kind man and Luhan is nothing else but a brat. One night while they were celebrating their engagement in the most famous club, a gang of masked men opened fire and many were shot. Hun dies on the spot, trying to shelter his fiance. With his last powers, Luhan drags himself in the bathroom where he collapses, squeezing his ring. When he wakes up he finds himself in Seoul, year 2012.

What will happen with Luhan when he will realize he has 365 days to save this Hun?

To make things worst this Hun is Sehun the a cold hearted CEO who lost his wife and son in a plane crash, more he is HOMOPHOBIC. After all he is the opposite of Hun. Sehun can't stand the idea of having a gay friend, let alone a lover.