Shi-Jie is a brilliant martial artist from the Kung Fu School. One day, he encounters a group of youths playing basketball and shows off how easy it is for him, with his martial arts training, to do a Slam Dunk. Watching him was Chen-Li, a shrewd businessman, who recruits him to play varsity basketball at the local university.

Pu Pu is dumped by her boyfriend whom she loves. Before she moves out, she asks to listen to "their song" just one more time, that is the hidden track by Jay Chou. Then she leaves him and goes to her sister's place in Hong Kong. All the while she is there, she searches for the same song, the "hidden track", and from this it leads her onto a journey of discovering love and a new beginning. Despite the whole movie revolving around Jay Chou's song, Jay Chou plays only a cameo part.

China, 1862: Lord Lindsey rules the opium trade and enslaves the innocent. The only hope for the oppressed nation, is a covert group of trained Wushu Warriors - The Red Lotus Society – who will fight to restore justice to its people.