Coming from a poor background, Hyun-woo works for Soonyang Group and serves the owner family. Chairman Jin Young-ki of Soonyang Group suddenly faints, and everyone in the family quickly looks for a chance to take the position. Meanwhile, Hyun-woo finds the paper company that’s been creating slush funds for Soonyang and is sent on a mission to retrieve them.

Hyun-woo realizes that he was reborn as the youngest grandson of the Soonyang family, Jin Do-jun. As he comes from the future, he gives useful advice to Chairman Jin Yang-chul, the founder of Soonyang who is now his grandfather. He quickly wins the chairman’s confidence, becoming Chairman Jin’s most adored grandson.