A modern college student dies suddenly after staying up all night and finds himself transported to ancient times in the body of the spoiled son of a Duke's household. To avoid punishment from the system (going bald), he opens a milk tea shop, introduces a membership system, and launches VIP services, turning the ancient capital upside down. From a wastrel to a royal son-in-law, from a milk tea shop to ironclad warships—he changes not only one person's fate, but an entire era.