Cattle rustler Nevada dreams of living like an emperor in the West. Hoppy and the Bar 20 boys aim to put an end to his dream.

William Boyd
as Hopalong Cassidy

James Ellison
as Johnny Nelson

Jean Rouverol
as Margaret Arnold

George 'Gabby' Hayes
as Windy Halliday

Harry Worth
as George Perdue

Frank McGlynn Jr.
as Red Connors

Howard Lang
as Jim Arnold

Ethel Wales
as Clary Peters

Paul Fix
as Gila

J.P. McGowan
as Buck Peters