Du Xuanxuan grew up indifferently on the street, and was framed into a "black account bureau", thinking that his destiny was to be swallowed up. However, Tan Qingxi used the ledger as a weapon and taught him to use tricks to kill people and use the bottom line to save people. Step by step, they uncovered the secrets of Shanghai's dark web. They grew up at gunpoint and jokes, becoming darker and brighter, becoming more ruthless and ruthless.