Young-Joo (Park Yoo-Na) is a member of the national female curling team. She begins to experience ringing in her ears and this causes her to become a substitute player. Young-Joo travels back to her hometown. There, she meets Sung-Chan (Kim Min-Suk). Young-Joo had a crush on him in the past. Sung-Chan is a former member of the national male curling team. They become partners in mixed doubles curling.

10年后出狱的洙赫知道了自己有女儿的事实，决心离开组织过平凡的生活。等待洙赫出狱的老大应国因此对洙赫产生了背叛感，指示组织第2号人物成俊监视洙赫。一直对洙赫充满自卑感的成俊，委托被称为“洗衣机”的2人杀人组合除掉洙赫。