As a substitute for Xiao Yuchen's white moonlight, Liu Wanru, Shen Muhua married Yuchen and became the mistress of the Xiao mansion, bearing him two sons. However, Yuchen's grandmother favored a granddaughter and declared the estate would be inherited by a direct granddaughter. Coincidentally, Muhua's third pregnancy was a girl! Just as the whole mansion anticipated the birth, Liu Wanru returned. Wanting to destroy the unborn girl and use Yuchen's lingering feelings to seize the mistress position, Wanru tried every means to cause a miscarriage. At the critical moment, the seven-month-old fetus in Shen Muhua's womb developed a voice, conspiring with Muhua to blow the trumpet for the mansion battle against Liu Wanru...
