A young woman writer, seeking atmosphere, arrives in Mexico, where she stays with her father's friend Sid Bickley at their gold mine, the Blue Lotus. There she meets Bill Baxter, who gives her his dog Laddy for company. Soon, however, the notorious bandit Gorgez attacks the mine, leaving Sid unconscious and taking the gold and the girl with him. Meanwhile, Bill, on his way to pay a call, encounters his dog Laddy, bearing notes on his collar which the girl wrote during the ordeal. Speeding off in his faithful car to the Mexican's hideaway in the canyon, he arrives just in time to save the girl's honor, and after a struggle they escape, taking the gold. The bandits follow them in a chase across rugged terrain, but in the end they are defeated.