On New Year's Eve, Zhou Jianguo accidentally sent a message meant for his illegitimate son to the family group chat. Zhou Yu, who had been an only child for 22 years, discovered that her father had been having an affair for 14 years and had diverted 1.72 million yuan in subsidies to support his mistress. Zhou Yu joined forces with her cousin, a lawyer, to help her mother gather evidence and make Zhou Jianguo leave the marriage with nothing. But an unexpected truth came to light: a car accident years earlier had already left him infertile. After enduring countless twists and turns, her 45-year-old mother finally let go of the past and chose to live the rest of her life for herself.