Back in 1975, Song Huaixia became the "little widowed sister-in-law" shunned by everyone in Hualin County. My husband's family wants a house, and my neighbor is watching a show without a grain of rice in his pocket. But she didn't panic, set up an iron pot, and sold the porridge from the streets to the county's No. 1 Food factory. It's just that the cold-noodle officer Shen Yanbei who always comes to buy porridge is not just for a hot meal. He said: "Song Huaixia, your man's death was not right." With a bowl of porridge and a clue, the two people were involved in the same old case.