Set in the fictional Yong'an era, apocalypse ability user Shen Wanning accidentally binds with a system and transmigrates through the soul, becoming the unloved second young miss of the fifth-rank Shen family. Plotted against by her legal mother and elder sister to swap marriage arrangements, she takes her sister's place to marry into the bizarre-reputation Yongning Marquis Mansion. Relying on her apocalyptic survival experience and the system's golden finger, she steps by step punishes scumbags and slaps faces in inner courtyard domestic battles, gradually developing mutual romantic feelings with her innocent husband and progressing from opposition to alliance with the genius madman stepson, steadily securing her footing in the Marquis Mansion.