Xiao Man sends text messages every day to the old number of her mother in heaven, until Shen Yizhen answers her call—Yao Yao's mother. Shen Yizhen step-by-step leads Xiao Man out of the darkness and into the light. But Xiao Man is running away. She is afraid that this sudden "mom" will disappear like Su Wan. Under the sharp blade of the law and the flashes of reporters, Xiao Man finally learns to "call for help." And Shen Yizhen also learns to "catch her." When the last text message is sent to the mother in heaven and the last "Mom" is called out to a living person, the destiny of the old number should also change.