Hoppy, California and Johnny come to the ranch of a friend and his daughter, disguised as dude detectives from the east, to investigate the disappearances, without a trace, of several herds of cattle.
William Boyd
as Hopalong Cassidy
Andy Clyde
as California Carlson
Brad King
as Johnny Nelson
Wanda McKay
as Lucy Brent
Jack Rockwell
as Jim Brent
Norman Willis
as Kervy
Jimmy Wakely
as Lead Guitarist Cowhand
Johnny Bond
as Second Guitar Cowhand
Dick Reinhart
as Mandolin Cowhand
Robert Kent
as Henchman Drake
Tom London
as Henchman Gregg
Frank Austin
as Steve Farley, old prospector
