The rain at Linjiang Wharf has not let up in thirty years.
Before the leader of the Green Gang, Lu Zongshan, was brought to justice, he left behind these words: “The water at the wharf has never been clean.” They became a mystery weighing on the hearts of generations. Twenty-six years later, his adopted son, Lu Chenzhou, takes over the decaying gang. He must fend off the cross-border drug lord Kunsha's attempts to swallow them up and protect the men who make their living at the wharf, while also investigating the truth behind his adoptive father's surrender and exposing the web of corruption binding Linjiang's political and business circles.
The arrival of Su Wan, an undercover policewoman, is like a pebble dropped into muddy water, making the line between black and white increasingly hard to see. Uncle Zhong, with one lame leg, has guarded a secret for thirty years, and guarded Lu Chenzhou's life along with it.
When blades cut through the fog and loyal souls are buried in the river mud, Lu Chenzhou finally understands that the so-called underworld is nothing more than a trap in which people have no choice. He stakes everything on making a glimmer of righteousness shine through the murky river water.
