Yo-han Byun
A woman is attacked by Internet users after posting provocative remarks online. Using her personal information, they go to her place but what they find is her body; she took her own life. Who made her kill herself? Or, was she killed by someone else?
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.