Jackie Chan tones down the martial arts action but turns up the international espionage in this globe-trotting adventure. Buck Yuen (Jackie Chan) is a sporting goods salesman from Hong Kong who daydreams of living the exciting and dangerous life of an international spy. One day, Buck makes the news after he accidentally stops a gang of bank robbers from getting away with the loot, and his brief moment of celebrity attracts the attention of Many Liu (Eric Tsang), a low-rent private detective who's looking for help with a missing person's case. One of Many's clients is looking for his long-lost son, and Many thinks Buck is just the guy to help track him down. Buck signs on, and is sent to Korea, where he meets a mysterious man named Mr. Park; Buck doesn't think he's the man Many wants, but he wonders if he might be his own father, who disappeared when he was a child. Buck makes the acquaintance of Carmen (Kim Min-jeong), an attractive journalist who tips off Buck that Mr. Park is actually an infamous North Korean espionage agent; Buck confronts Mr. Park, who has suddenly fallen ill, and Park on his deathbed tells Buck a riddle that, if properly decoded, could lead him to a great fortune. As Buck and Carmen try to unravel the mystery of Mr. Park's final words, their adventures lead them to Istanbul, where the fate of millions is suddenly put into Buck's hands when he discovers a deadly biological weapon coveted by Mr. Zen (Wu Hsing-kuo), a ruthless Chinese crime boss. One of Jackie Chan's most lavish Hong Kong-based vehicles, Takmo Mai Sing was a massive commercial success there, where it did impressive business opening on the Chinese New Year.
by Mark Deming synopsis