Jack Lupton loves three things in the world, Buck his dog, Scout his horse and the lovely rancher's daughter Mary Gale. But his beloved horse Scout was driven off by man's cruelty and finding freedom, now leads a big herd of horses to run wild! And Jack has his own problems with the cruelty of his fellow man, in the form of James Hill his brutal and jealous rival for Mary's affections!

Dorothy, and her big city lawyer boyfriend, return to the Lazy 'B' ranch to read her late father's will. For Dorothy to inherit everything, she must stay on the ranch for 5 years. If she does not, everything goes to Buck, who is the manager. She does not like Buck, so she makes a deal with the wrong people for cattle and then the outlaws go to the ranch to get the $10,000 from her. But Buck is on the job.

Captain Nemo has built a fantastic submarine for his mission of revenge. He has traveled over 20,000 leagues in search of Charles Denver - a man who caused the death of Princess Daaker. Seeing what he had done, Denver took the daughter to his yacht and sailed away.