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.

Do-jun gets into the law school of the most prestigious university at the top of his class as he promised Chairman Jin. The land he received in return provides him enough money to start investing in companies. He goes on a trip to the US with his father and meets Oh Se-hyun, an investment manager.

The IMF crisis causes Ahjin Motors to file for court receivership. Chairman Jin Yang-chul wants to acquire the company, but Do-jun stops him at all costs because he knows it will bring misery to his family from his previous life. However, things get difficult for Do-jun as Cheongwadae steps in to mediate the acquisition.

Seong-joon joins Soonyang Construction with ulterior motives. Do-jun convinces Se-hyun to acquire Jaea Construction to build a digital media city in Sangam-dong. Soonyang also eyes that area, but they need the new Seoul mayor to give the project to them. Chang-je gets elected as the new mayor of Seoul, but he goes against Chairman Jin and gives the project to Jaea Construction.