The talented stammering teenager Qin Feng (played by Liu Haoran) failed in the police academy and was sent to Thailand by his grandmother to find a distant cousin - known as the "No. 1 Detective in Chinatown", but in fact, the obscene uncle Tang Ren (played by Wang Baoqiang) was distracted. After not wanting to spend a night drinking, Tang Ren became a suspect in a bizarre murder and had to die with Qin Feng...... The relentless police detective Huang Langden (played by Chen He), the invincible lucky policeman Kun Tai (played by Xiao Yang), the vicious gang trio, the unfathomable godfather of Chinatown, and the glamorous and coquettish proprietress Ah Xiang (played by Tong Liya) all appeared! Seven days! Tang Ren and Qin Feng must learn from each other's strengths and make up for each other's weaknesses and share the same hatred! Will they be able to evade police pursuits, gangster pursuits, and gangster encirclement, and complete the ungodly tasks of finding the lost gold, identifying the real culprit, and clearing their names in just seven days?
The first half of the film is a hardcore crime action movie that tells the story of a hitman caught between a cop and a gangster, fighting to survive. The second half is a comedic reinterpretation of the story in the form of a self-parody. Takeshi Kitano plays the protagonist killer "Rat".