Sun Woo-jin, a penniless orphan from Joseon, catches the attention of Yakuza Yagamata from Japan, who recognizes his genius abilities through a certain incident and proposes a partnership.
As a result, Sun Woo-jin enters the social circle of Incheon and builds friendships with nobles.

One day, he meets the members of a Korean independence armed group called “Eobyeolgyo” and receives information about his father’s secret and their proposal.
Determined to join forces with them, he begins to dive into a high-stakes gambling game for the fate of his homeland.