During the Song period, Song Shiwei's husband Fu Jingnian and his twin older brother Fu Yan'an went to the battlefield together. Fu Yan'an died saving Fu Jingnian. To obey his older brother's dying wish to take care of his sister-in-law, Fu Jingnian disguised himself as his older brother Fu Yan'an, wanting to have a child with his sister-in-law before revealing the truth. However, he disregarded Song Shiwei remaining chaste for him, not yielding even when she was reduced to a brothel and hung up for seven days and seven nights. Fu Jingnian took Song Shiwei back home, believing his deception was flawless, but Song Shiwei accidentally learned the truth through a twist of fate.