Soo-hyun comes across magical pills that allow him to go back and forth in time. 30 years to the past, young Soo-hyun meets future Soo-hyun and learns that his girlfriend will soon die because of him. In order to save her, the two Soo-hyuns try to change the past together, but a completely new and unexpected past is formed that leads to a new future.
김윤석
as Soo-hyun
변요한
as Young Soo-hyun
채서진
as Yeon-ah
김상호
as Tae-ho
안세하
as Young Tae-ho
박혜수
as Soo-a
김호정
as Song Hye-won
김성령
as Yeon-a
장리우
as Mother
정인기
as Manager Yoon (uncredited)
이유미
as Yeon-ah's Staff (uncredited)
박길수
as Barbershop Owner (uncredited)
