A terrible car accident wipes 10 years of Suk-won’s(played by JUNG Woo-sung) past from his memory. With his family, friends and even his own identity now just a blur, he comes across a woman, Jin-young(played by KIM Ha-nel) at the psychiatric clinic, shedding tears as she stares at him. Although he has no recollection of knowing her, this encounter triggers a relationship between the two and brings a newfound happiness into Suk-won’s life.
교통사고 후, 지난 10년의 기억이 지워진 남자 ‘석원’(정우성).
친구, 가족, 심지어 본인이 어떤 사람인지조차 흐릿해진 석원은 병원에서 우연히 자신을 보며 눈물을 흘리는 낯선 여자 ‘진영’(김하늘)을 만난다.
그녀에 대해 잘 알진 못하지만 진영과 함께하며 새로운 행복을 느끼는 석원.