Old timer Hank Robbins and his young pal,"Red" Hepner ride into the town of Cajon, Mexico and find it under a reign of terror imposed by a mysterious outlaw known as El Lobo.
George's partner in vaudeville quits their act, claiming that Betty has broken his heart. George then teams up with Charlie, a stranded trouper, and Irving becomes their manager.
Farina, Joe, and friends use dogs to power their "roadsters," but following a lesson from the head of the Be Kind to Animals Society, they make it their cause to rescue animals from bad treatment.
Alex St. George, a young RFC pilot, is anxious about fighting in the First World War. He is comforted by sensitive shop assistant Kitty, and the two fall in love, marrying before Alex is sent to the front.