At Zhang Xiaogang and Gong Lili's wedding, the marriage is called off when Gong Lili's mother suddenly demands more money. Zhang Xiaogang immediately proposes to Qin Luo, the bridesmaid who has secretly loved him, and they marry in a whirlwind. After the wedding, Zhang Xiaogang becomes buried in debt after taking out online loans to buy a house. Egged on by Gong Lili, he murders Qin Luo, kills her father, and leaves her mother in a vegetative state. Qin Yun, Qin Luo's twin sister, returns and carefully sets a plan in motion, exposing the truth and sending the perpetrators to prison one by one. She completes her revenge while demonstrating her unwavering devotion to family.