After sixteen years of mistreatment by her adoptive parents, Xiaoman travels alone to Chongqing to find her biological family. She expects that even after returning to her birth mother's home, she will still have to deal with rejection from the fake heiress. But who would have thought that Jiang Nanjia might have a sharp tongue, yet is even fiercer when it comes to protecting her little sister! When Xiaoman rushes to do the housework, her older sister snatches away the mop and says, 'You're here to be a daughter, not to get a cleaning certificate.' When Xiaoman is bullied at school, her sister is the first to stand up for her. And when her adoptive parents show up demanding money, her sister steps in front of her, refusing to back down even half a step.