Xu Lianjie and Ye Rong have an illicit affair. Ye Rong lies that her boyfriend has left and she has nowhere to go, so she borrows a room to stay at Lin Shuya's home. Lin Shuya is kind-hearted and takes meticulous care of her, but upon learning the truth, she puts on a magnanimous facade, falsely thanking the other party while secretly gathering evidence of their interactions and information on the child's biological father. She arranges for a doctor and a nanny to provide round-the-clock care to prevent being framed. Ye Rong still instigates Xu Lianjie to steal the agate mother-and-child buttons, framing Lin Shuya for hiding harmful items in accessories, and colludes with the nanny to slander her for intentional harm. Lin Shuya defuses each crisis one by one, ultimately producing a paternity test, a certificate proving her husband's infertility, and a key witness, making the two lose all face and reap what they sow.