Jeong Yun Ho, who was the vice president of top entertainment and the top actress Ju Yeong In's husband. He's a success man, but he always feeling empty inside. Would his life have changed if he made a different choice? Ten years ago, he lost his precious smile. And now, as the last word, a mobile phone rang. " what the hell? i'm going to die?!?" But wait, it's wierd. He's going back to his first year of life! The life of " first year max leveld manager" is just beginning.