Mu Wanning was born infertile, so she forced Song Chuwan, an illegitimate daughter of the Mu family who looked similar to her, to consummate her marriage with Qi Yanzhou and give birth to an heir. Song Chuwan, who had been bullied since she was an illegitimate daughter, decided to take this opportunity to marry Qi Yanzhou on Mu Wanning's behalf in order to escape and take revenge on the Mu family, making him his own.
