Jiang Ruanyu was naturally lustful because of being punished by God. Once she kidnapped a beautiful young man named Rong Hong from a poor family, but Rong Hong accidentally discovered her secret of another sequelae of the punishment - "she turns into a man when she gets her period". In order to keep the secret, Jiang Ruanyu raised Rong Hong in the mansion. Rong Hong saw that Jiang Ruanyu was not getting what he wanted from his fiancé Fu Zijin, so he came up with a plan of "seeking Runyu" and reached a cooperative relationship with Jiang Ruanyu. Jiang Ruanyu helped him rise to prominence in the court, and he helped Jiang Ruanyu win Fu Zijin's sincerity. The deeper Jiang Ruanyu gets involved, the more she realizes that everyone, including herself, is just a pawn on Rong Hong's revenge chessboard. But by this time, Jiang Ruanyu has fallen in love with Rong Hong. However, if Jiang Ruanyu does not successfully marry her destined man, her fiancé Fu Zijin, she will suffer a natural disaster and die on the day she turns fifteen. At this time, there is only one year left before she reaches the age of hairpin.
