Mimi started to gamble, dreaming of turning her life around. One night, she loses her family in front of her eyes in an unknown attack from an unidentified assailant.

Moon, a middle aged woman who works at a mart while raising a high school daughter alone. Moon had come to Lake Sanjeong with her crush on a picnic last fall, but now she visits the area alone. Jin-cheol wakes up in the morning to find a stranger in bed with him. To make matters worse, she is in high school! What will happen to the two? Will they fall in love?