Between Hong Kong, Macau, Shenzhen and Wuhan, an anti-gang operation spreading to four places is quietly unfolding. Police team leader Liang Tianqing was transferred to Shenzhen for exposing the corruption of his superiors, and accidentally got involved in a confusing underworld case. As the investigation deepens, he discovers that Macau casino tycoon Zhou Zhen not only controls the dark web of illegal transactions, but also colludes with high-level politicians, weaving a dark web that is difficult to break through. Reporter Ye Jingshu is determined to reveal the truth, but accidentally touches the truth about her father's mysterious death. The confrontation between justice and darkness gradually escalates. However, the root cause of corruption is far greater than imagined... Can justice win? Or will darkness eventually swallow everything?
