Before graduating from the Military Academy, Qin Chuan was selected in a special screening and joined a mysterious special department. After the experience of "shooting death row" and "investigating and dealing with privately built gun gangs", comrades-in-arms sacrificed one by one, and Qin Chuan slowly grew up in these cruel trainings. Finally, Qin Chuan accepted the orders of his superiors, secretly sneaked into the Golden Triangle Prison and started a special infernal affairs mission.