Tang Yuan moved into a new community after finishing the unsolved case of dismemberment in Beishan, and unexpectedly uncovered an old case in which a neighbor girl, Feng Xiaoshu, was forced to commit suicide three years ago. She used cockroaches to sneak in to collect evidence, and uncovered Wu Ye, a teacher who tutored obscene girls and sold private photos on the dark web, and destroyed a pedophile dark web gang. Subsequently, he successively solved the kidnapping case of the second generation of three rich people, the serial murder case of campus revenge over the past fifteen years, and went to Beishan to solve the kidnapping conspiracy directed and acted by the second generation rich man Duan Weijia to murder his stepmother. Rats, cockroaches, flies, and mosquitoes under her command form a four-pest task force, each using their special abilities to collect secret evidence that is difficult for ordinary people to obtain. Tang is an ordinary consultant chasing bounties and always sticks to the bottom line.
