Su's mother-in-law, Cai Xiang, accidentally misplaced a mysterious "OO," which led to the police's concern. Su's children were all dumbfounded by the situation. Her son, Bingren, irresponsibly ran away, her daughter, Bing'ai, brandished a knife to interrogate, and Bingzhong, lacking filial piety, suggested calling the police. In the end, even Xiaoou and Damei were taken into custody and sent to the police station together! What kind of trouble did Su's mother-in-law get into? What kind of antics will this family come up with?