Soo-hyun discovers enchanted pills that enable him to travel through time. Journeying 30 years into the past, the younger Soo-hyun encounters his future self and discovers that his girlfriend’s impending death is linked to him. To prevent this tragedy, both versions of Soo-hyun collaborate to alter the past. However, their efforts result in the creation of an entirely different and unforeseen past, which in turn shapes a new future.