Nicholas Tse plays Ha Ling Chun in "double dragon" of his son, Ha Ling Chun Wu Yi with a superb, and Nicholas Tse is excellent material a pair of martial arts, but Nicholas Tse is a day idle about and have neither learning nor skill of the prodigal son, Ha Ling Chun in order to avoid the son learn martial arts after wounding, not teaching martial arts to Nicholas Tse, finally lead to his son and then become enemies with each other, Nicholas Tse left home away from home, but accidentally learned excellent time, but this time but the accident occurred, after some setbacks, between father and son began to mutual understanding, and jointly deal with the enemy.