As rustled cattle have mysteriously disappeared, Johnny sends for his friend Hoppy, Hoppy arrives and immediately suspects Dan Slack. Realizing his telegram about Slack was intercepted, he locks up the operator Lafe knowing he can escape. Tailing Lafe he finds a secret entrance to a mine and inside finds the missing cattle. But Slack's men also find him just as the cattle are stampeded through the mine shaft.

Genres

Cast

William Boyd

Hopalong Cassidy

Andy Clyde

California Carlson

Bobby Larson

Bobby Longstreet

Victor Jory

Dan Slack

Jay Kirby

Johnny Travers

Forbes Murray

Bart Gailey

Christian Rub

Sooky Withers

George Givot

Sam Bucktoe

George Reeves

Harrison Brooke

Hal Taliaferro

Telegrapher Lafe

Bill Nestell

Bartender

Bob Kortman

Blackie