Set in the humid and muggy southern coastal city of Lanzhou. Under the urban landscape where the old and the new alternate, there is hidden an inter-provincial trafficking network controlled by Zhou Hairong. Under the guise of "labor agency" and "marriage agency", it has secret connections with the underground porn industry and the black market of organ sales. The police set up a task force and sent Jiang Yin to sneak in. The goal was to obtain the core "ledger" and achieve a full-chain attack.
