Due to misunderstanding, Jung Da-ae and Lee Han-eol become ultimate enemies who couldn’t even stand the sight of the other. However, when their siblings get married, things become even worse as they have more chances to see each other. But then, in an unfortunate accident, the newlywed couple died. All that is left for the remaining is a grievance and mourn. In a heated argument while driving, Jung Da-ae and Lee Han-eol get hit by a truck and died. They got the chance to live again and come back to the time when they were still in high school.
Can they fix everything?