Tang Ren (played by Wang Baoqiang) tricked Qin Feng (played by Liu Haoran) into joining the World Detective Contest in New York for a huge prize. However, as the ridiculous competition against detectives from all over the world went on, they discovered the bigger secret behind this challenge…...

After Bangkok and New York, there is another big case in Tokyo. Tang Ren (played by Wang Baoqiang) and Qin Feng (played by Liu Haoran), detectives in Chinatown, were invited by detective Noda Hiroshi (played by Tsumabuki Satoshi) to investigate. After hearing the news, the detectives in the “CRIMASTER World Detective Rankings” gathered in Tokyo to join the challenge too. Furthermore, the appearance of Q, the first place in the ranking, makes this case even more puzzling. A funny competition among the strongest detectives in Asia is coming soon……...

After failing to get into the police academy, Qin Feng (played by Liu Haoran), the talented boy who has a stutter, was sent to Thailand by his grandmother to find his distant cousin Tang Ren (played by Wang Baoqiang), the so-called “No.1 Detective in Chinatown” who is actually an unkempt middle-aged man, to relax. However, after a night’s fun, Tang Ren became the suspect of a bizarre murder and had to run away with Qin Feng…… Can they escape from the police, the bandit and the gangster, find the lost gold and find out the real murderer to prove their innocence in just seven days?...