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.
Kim Yoon-seok | Soo-hyun (present) |
Byun Yo-han | Soo-hyun (past) |
Chae Seo-jin | Yeon-a |
Kim Sang-ho | Tae-ho (present) |
Ahn Se-ha | Tae-ho (past) |
Park Hye-su | Soo-a |
Kim Ho-jung | Song Hye-won |
Kim Sung-ryung | Yeon-a |
Jeong In-gi | Manager Yoon |
Lee You-mi | Yeon-a's staff |
Park Gil-su |