This film is about Fong Sai-yu going under cover as a servant in the villain's mansion. He is a famous fighter that fights for justice. While at the mansion he met the great Kow Lee played by Tao-Liang Tan also a great fighter that works there for the villain. He recognize Fong Sai-Yu right away and challenge him to a fight because he wanted to match his fighting skill with the famous fighter. At first Fong Sai-Yu declined but eventually agreed after the great Kow Lee threatens to reveal his identity. They met on top of a mountain where they fought to a draw and then became great friends. The great Kow Lee later help Fong Sai-Yu at the end of the film to defeat the villain who was very tough to beat.

A child finds a magic statue in a cave. This is a Thai idol that protects the world from an invasion by extraterrestrial giants. Edited from the Tsuburaya-Chaiyo co-production Jumborg Ace & Giant (1974), combining the special effects footage with newly shot drama scenes featuring a Taiwanese cast to create a loose adaptation of the original story that jettisons the connections to Tah Tien (1973) and Jumborg Ace (1973).