Seo Jiwoon questioned the death of his sister who was in a car accident that happened with top celebrity actor Cha Taehyuk. While searching for Cha Taehyuk, he ends up being hit by a car and dies. However, he suddenly wakes up and realizes that he has returned to the first day he started working. When he wakes up, he encounters the very person he has been searching for. Isn't "Cha Taehyuk" the person who was with my sister?!