Introducción breve: Xiao Jian, director of Economic Investigation Division, investigates a mysterious financial case led by financial tycoon Xu Feng and consequently finds that a transnational money-laundering group is involved. Xiao Jian gets the diary of Xu Feng by accident and finds out Xu Feng's hidden identity. Faced with a strong enemy and the pressure from his superior, Xiao Jian still investigates the case unswervingly with a strong sense of responsibility and mission. In the end, Xiao Jian finally overcomes one after another obstacle and brings the giant financial criminal organization to justice.