Li Xiuying falls and needs surgery, so the hospital director urgently summons Chen Lin, who is on leave—but Li is Chen's former mother-in-law, a woman who once tormented her. Racing to the hospital, Chen Lin collides with Li's son, Liu Hao. Recognizing his ex-wife, Liu Hao argues with her, and his girlfriend Yan Jiaojiao and her brother even beat Chen Lin and a neighbor who tries to help, forcing Chen Lin to sign a 300,000-yuan IOU before letting her go. Liu Hao later learns his mother is in surgery and rushes to the hospital, mistaking a critically ill elderly patient for her; after learning the truth, he goes to the ward, only to find his mother awake and demanding to hold Chen Lin accountable. Just then, a video of Liu Hao and the others blocking Chen Lin goes viral, and Li Xiuying, ashamed, brings her family to kneel before Chen Lin; the IOU is torn up, and Liu Hao and the others are taken into police custody.