Plot Summary:
For generations, the secret service has always been responsible for protecting the emperor, where 12 agents are assigned to bodyguard duty. Among the current group, Zero Zero Dog (Louis Koo) is considered to be the weakest as he shows no interest in the martial arts and spends his time studying technology and coming up with scientific inventions. When Dog uncovers an evil plot to kill the emperor by the chief eunuch, Cao Yan Chui (Fan Siu Wong), he decides to eliminate the enemy himself.

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