25 's Shanghai , detectives Tang Lang opened a political shady , had to leave the Police Force . He presided over the justice of the heart is firm, so in Shanghai established the first private detective agency . Dubai Long was sentenced to life imprisonment , escape and vowed revenge avenge judge Xietian Hong person's life is threatened . Tang Lang the protection Xietian Hong , accidentally discovered that when Dubai Long imprisonment even really with the injustice ! Huang Shao studies of young women lawyers from the United Kingdom , received a mysterious commissioned for Dubai Long to reverse the verdict . When she arrived in Shanghai , Dubai Long has escaped missing. Huang Shao were unable to find the parties , in their hands the case file has become the focus of the competing parties . Lang Tang and Huang Shao these two strangers , because it was discovered the mystery of the mystery of Dubai Long , was the mysterious killer to kill ...