This drama begins with Xiao Jian of director of economic investigation (Yu Yi is acted the role of) investigation bizarre traffic accident case, through pair of "sea xiang group" illegal control the investigation of the stock market is thorough, cause pair of mysterious commerce big crocodile Xu Feng (Guo Jingfei is acted the role of) the pioneering history in the past is probed into. And of the pressure of the loss of key witness, social public opinion, dead mastermind, Xu Feng identity is opened, one pile after another will spearhead points to the financial big case 20 years ago, be dragged in later a bigger transnational money laundering group. Xiao Jian accidentally got xu Feng hidden diary, found another heavy identity xu Feng hard to hide. Strong enemy is current, pressure is hind, the Xiao Jian that pursues ceaselessly breaks through heavy predicament with sense of responsibility and mission, will huge financial crime organization finally catch all at once.