In the distant past, an ancient evil known as the Bamboo Man hoardes the legendary Sunstone Map of Kowloon, a key to a power... a power... a power most... big.
The Bamboo Man's plans, however, are endangered when Chen Chow Mein, master thief, steals the map and joins up with his pals Reepo and Lao Ze, the rest of the Kung Fu Rascals.
When the Kung Fu Rascals seek the help of the Old Wise Guy and decipher the mystery of the map, the Bamboo man sends the evil (and mondo cool) Sheriff of Ching Wa County and his henchmen(?) Dar Ling and Ba Foon to stop them from getting to the Power Most Big.
Things start to look dark when Lao Ze is captured by the psychotic Imperial Torture Master. Will the Kung Fu Rascals prevail in their darkest hour? What do you think?!
Destructoid also has a great synopsis of the movie here.