The local school is causing Hoppy problems. First Bar 20 cattle are stolen when Hoppy investigates a problem there. Then the new teacher arrives and disrupts the routine of the Bar 20 hands. Later with the Bar 20 hands at graduation, the rustlers are poised to strike again. But there is dissension among them and this will lead to the break that Hoppy needs.
Hopalong Cassidy
Windy Halliday
Lucky Jenkins
June Lake
Jud Thorpe
Buck Peters
Mrs. Peters
Snooksie
Artie Peters
Quirt
Sutton
Townsman
Townsman
Bar 20 Cowboy
Townsman
Townsman
Townsman
Townsman
Townswoman
Rustler
Bar 20 Hand
Rustler
Slim