Hoppy is leading a scientific expedition and the Chinese who have a hidden settlement nearby are trying to stop them. Saulters and his outlaw gang are also in the area looking for a gold mine. When Saulters men attack, the gold mine is found. Hoppy agrees to file for the Chinese and heads after Saulters in the chase to the land office.
Cast
William Boyd
Hopalong Cassidy
Andy Clyde
California Carlson
Brad King
Johnny Nelson
Soo Yong
May Soong
Barbara Britton
Jennifer Kendall
Douglas Fowley
Slade Salters
Keith Richards
Clay Elliott
Richard Loo
Quan
Lee Tung Foo
Doy Kee
Gordon Hart
Malcolm Birdsall
Earl Gunn
Clanton
Ian MacDonald
Hollister
John Rawlins
Williams
Roland Got
Yeng
Hal Price
Balto Stubbs
Art Felix
Shoots Elliott
Johnny Luther
Bar 20 Cowhand
Charles Murphy
Henchman
Bill Nestell
Horse Seller
Jack Rockwell
Sheriff Mulhall
