April Snow

Accident
On live concert hall, lighting director, In-su (BAE Yong-joon) leaves the hall in a hurry putting the concert in charge of his junior worker. Then in a hallway at a hospital operation room in Samcheok, Kangwon-do, he meets Seo-young (SON Ye-jin). The reason he went there is a car accident of his wife, Su-jin (LIM Sang-hyo). Also, Seo-young's husband, Kyung-ho (RYU Seung-su), was in the car with her.

Betrayal
While Su-jin and Kyung-ho are in unconsciousness by serious injury, In-su and Seo-young realize that Su-jin and Kyung-ho are in 'special relationship' on settling the accident. For In-su and Seo-young, it is harder to accept than the fatal accident. Love becomes confusion, anger, and betrayal. While they pray for their spouses' peaceful recovery even though they blame for it, the two people fell each other's existence slowly.

Chaos
In a motel in front of the hospital, the two people start long term stay and meet each other again and again. Eventually, they fall in love spending their time together. Even they were confused by their spouses' betrayal, now they experience the same pain their spouses did as they fall into the same situation. At this time, Su-jin comes back to consciousness. In-su cannot look away from his wife shedding tears. While looking at In-su, Seo-young realizes that it is time to go back to their own places. Then, they prepare for going out, which might be the last time, only for the two.