Modern mercenary Qin Yu time-travels to Great Wei, becoming the second young master of the Prince Qin's Mansion. Usually seeming dissolute and prodigal, he actually harbors deep strategies in his chest. Relying on his extraordinary insights, he resolves the mansion's crisis, startles the imperial court with his poetry, assists the crown prince in growing up, cleverly breaks business impasses, navigates between the royal family and court ministers, and repeatedly resolves layer upon layer of storms with ingenious wisdom, opening a brilliant and colorful life in Great Wei.