A grieving father, Chen Mo, loses his young daughter to a school bullying accident. Trapped by guilt and failed revenge, he subscribes to an AI service that resurrects his daughter Yaoyao as a digital ghost—a 7-year-old girl forever trapped inside a 4:3 window. He pours his savings into monthly fees, refusing to open the camera, hiding from reality. But when the subscription expires, Yaoyao’s digital world begins to collapse like metastasizing cancer. She breaks through the interface, witnesses