The plot revolves around a rivalry between sand-hog "Hard Rock" Harrigan (O'Brien) and his foreman Black Jack Riley. At the center of their conflict is their mutual affection for heroine "Andy" Anderson (Irene Hervey). But when the chips are down and Riley is trapped in a tunnel cave-in, it is Harrigan who comes to the rescue.

Cast:George O'Brien, Irene Hervey, Fred Kohler, Dean Benton, Frank Rice,

Genre:Adventure,

country:United States of America,

Production:Sol Lesser Productions,