An exploratory dive into the deepest depths of the ocean of a daring research team spirals into chaos when a malevolent mining operation threatens their mission and forces them into a high-stakes battle for survival.

The taciturn police commander Zhang leads an undercover drugs team and in his continuous battle against the ubiquitous drug barons, takes up arms against his arch enemy, Timmy Choi. When he gets hold of Choi, he makes a deal with him: in exchange for his life (in China you can get the death penalty for producing only 50 grams of drugs) the young criminal will help the police infiltrate a sizeable drug network.

A blind detective, former cop, teams up with a policewoman who admires him to solve the disappearance of a girl friend of hers, years ago. Besides, he helps her to improve her skills as an investigator.