In late 19th Century Hong Kong the British may rule the land, but the pirates rule the waters. One Coast Guard officer is Dragon Ma, who is determined that his beloved Coast Guard will not be made a fool of.

Youthful master Jackie Chan is searching for his missing brother, when he is mistaken for a criminal on the lam. He must prove his innocence by solving the case himself, while local lawmen and merciless mercenaries are hot on his trail.