Magic crystal

Archaeologist Shum finds an antique jade with supernatural power in Greece. The stone is wanted both by KGB's agent Karoff and the Interpol. Shum asks his friend Nike (Andy Lau) for help. However, Shum is finally caught by KGB but the jade is slipped into the hands of a boy called Pan. He discovers the crystal is from space and they become friends. While Nike is imputed and jailed, Karoff comes and captures Pan to get the jade...