In 2050, through the construction of Alice, humans can finally travel through time. But soon the existence of a book of prophecy, which predicts the end of time travel comes to light. When Yoo Min Hyuk and Yoon Tae Yi, a couple working at Alice are sent to the year 1992 to secure the rumored book, Tae Yi realizes that she has conceived a child and decides to stay back in the year 1992. After changing her name to Park Sun Young, she eventually gives birth to a son, Park Jin Gyeom. As a side effect of time travel, Jin Gyeom suffers from the inability to express emotions.