Jackpot, also known as The Royal Gambler, is a historical drama set during the Joseon Dynasty. The story follows Baek Dae-gil, a prince born into royalty who is forced to live as a commoner due to a tragic turn of events. Growing up in the harsh streets, he becomes the most skilled gambler in the kingdom, utilizing his sharp wit and luck to survive in a world of corruption and power struggles. As he grows older, Dae-gil crosses paths with King Yeongjo, his younger brother who is fighting to maintain his grip on the throne. The two brothers become locked in a high-stakes game of fate, where the prize is the kingdom itself. Along the way, they are joined by Dam-seo, a woman born with a mission of revenge, creating a complex web of political intrigue, brotherhood, and betrayal that threatens to reshape the history of Joseon.