The 10th Tuscolano is dealing with a case involving the Chinese community of the capital and requiring environmental wiretaps and long shadowing involving all of Scalise's men. It seems that the owner of a Chinese restaurant has been kidnapped. On this occasion, Manrico and Mauro use technical means to continue their investigations on Saro, putting his girlfriend, Laura, under surveillance. Luca is preparing his resignation letter. However, the advanced pregnancy and the doctor's recommendations force Giovanna to follow the case from the police station, under the watchful eye of Manrico, who is very apprehensive. The Chinese case turns out to be much more complex than expected, it is a real internal war between two mafia families with mysterious and disturbing implications. Meanwhile Luca and Valeria are dealing with a scam by a skilled door-to-door salesman, while their colleagues think of a farewell gift for Luca.