Sehyun and her family are on their way to Jejudo to watch the Super Bowl, but the rain has made it impossible for them to stay inside. They decide to go to the river valley to take a picture and send it back to Soeun, who is on his way to the game. Sehyun's mother is also on her way, and they decide to have fun together, despite the fact that it is raining and they are trapped inside a house. When they are finally able to get out of the house, they discover that they have been swept up into the river and are unable to move. They realize that they must stay in the river until dawn, which means that they will have to spend the night in the water until morning. They try to convince themselves that they owe each other their lives.