History student Julian Thorne time-travels to Eastern Jin Dynasty, where his father forces him to be a male concubine, and Cherie, Demon Sect's holy maiden, targets him for assassination. He is forced to marry Autumn Shaw, notorious for killing husbands. He navigates Shaw's schemes, Cherie's threats, and aristocratic power struggles, using modern knowledge to resolve crises. He saves the emperor, sheds his matrilocal husband status, and establishes himself.