On a scorching afternoon, a mother-in-law hides the air conditioner remote to save electricity and locks the front door from the outside before leaving to dance. Her five-year-old granddaughter, Duoduo, hides inside the refrigerator to escape the heat and becomes trapped. Shen Ning, a doctor and the girl's mother, notices something is wrong after receiving clues from a neighbor, but her husband, Chen Kai, delays the rescue, hoping everything will be fine. The property management team breaks down the door in an emergency and rescues the unconscious girl, causing the family's conflicts to erupt. After this life-or-death ordeal, the mother-in-law moves out and reflects on the importance of respecting boundaries, while the couple rebuilds their trust and works together to protect their child.