Ling Shang

Chang Chen-Wai, a martial arts expert who runs a jade-importing business, follows his missing brother to Thailand and learns he has been murdered. Chang vows revenge.

When a once infamous criminal decides to give up his lifestyle and return the many treasures he has stolen to their rightful owners; he is promptly murdered by his partners in crime. To avenge his death is his son, with the deadly "mantis fist".