Lin Xiuyuan finds himself in a disorienting reality: the year is 2025, and he has awakened in a parallel version of Seoul. While the world appears identical to his home in 2013, the passage of twelve years has left him a stranger in his own life. Discovering a mysterious portal that connects his current residence to his original timeline, Lin Xiuyuan realizes he possesses a unique bridge between the past and the future.

However, his dreams of easy wealth through foresight are quickly shattered when he discovers that the two timelines are divergent—lottery numbers and stock trends do not align. Forced to navigate a high-stakes reality where he is an outsider, he begins to leverage his knowledge of future events to influence the lives of those around him, starting with the iconic K-pop idol Jessica Jung. As he balances the secrets of two worlds, he must decide how to use his advantage in a society defined by rigid hierarchies and cutthroat entertainment industry politics.