Jiang Jiamin has endured her mother-in-law Shen Qiaolan's constant tricks for years. At a family reunion dinner during the Mid-Autumn Festival, she is deliberately misled into eating food containing an allergen, triggering a sudden medical emergency that sends her to the hospital. Her bone marrow donation plan is interrupted, and her younger brother Lu Chengze's condition worsens. She hires a lawyer to gather evidence, and with the help of her best friend Lin Qi, builds a complete chain of proof. But Shen Qiaolan retaliates by rallying relatives to condemn her online. At the critical moment, Jiang Jiamin's mother arrives and makes her see reason. Jiang Jiamin nevertheless chooses to complete the stem cell collection and save Lu Chengze. In the end, Shen Qiaolan faces the punishment she deserves for disrupting the court proceedings. After the turmoil, Jiang Jiamin's family moves away to begin a new life, and she finally understands that kindness must have its boundaries and its edge.