Lin Qingxue receives 40 jin of blueberries specially sent by air by her brother. He pays a hefty shipping fee, thinking constantly of his younger sister, who married far from home, and repeatedly reminds her to refrigerate the berries properly and enjoy them little by little. Qingxue repeatedly warns her mother-in-law not to open the cold-chain shipping box without permission. But when she returns home from work, the entire box of blueberries has mysteriously disappeared. Both her mother-in-law and father deny ever seeing the berries. Faced with her family's united front of evasions and excuses, Lin Qingxue feels deeply wronged and finally sees the favoritism and indifference hidden in her family's everyday behavior.