The story takes place in Hong Kong and tells a series of stories about a grandmother living in the mainland who went to Hong Kong to find her long-lost son. The protagonist of the story, grandma, came to Hong Kong with the help of the kind-hearted girl Qian Qian, and took various ways to find her lost son Hui. During this period, she experienced many difficulties and was helped by many kind-hearted people. Fortunately, the mother and son were reunited in the end and had a happy ending to the story. The animation adopts the way of two-dimensional frame-by-frame animation, and has made a lot of efforts in the design of sub-mirror, scene and light and shadow, mainly pursuing the texture performance of two-dimensional animation.