Rancher Matt Black is willed half of a Nevada gold mine. Arriving there, he learns that the heir of the other half is a young girl named "Bertie." Realizing that there may be some dirty work and theft going on at the mine, he conceals his identity and gets a job as a miner.

Two sailors (William Haines and Cliff Edwards) are leaving the US Navy after 10 years. In their spare time, one of them (Haines) invents a carburetor that should increase the speed that powered boats will run, but all they succeed in doing is sinking the Admiral's barge. After discharge, broke and out of work, they find work with a boat builder who wants the fastest race boat in the world. They design the boat, carburetor and the engine but lack of money and the foreclosure of the business hinders their efforts to prove the new design.

Made during the early days of sound cinema, this tense submarine adventure is an intriguing example of a hybrid silent-talkie. A disgraced English sub commander changes his name to Burke and joins the American Navy. When the U.S. submarine on which he is serving as a torpedo launcher begins to sink, Burke must make the ultimate sacrifice to save as many crew men as possible..

Stephen Ghent, a mineowner, falls in love with Ruth Jordan, an arrogant girl from the East, unaware that she is the daughter of his dead partner. Ruth is vacationing in Arizona and Mexico with a fast set of friends, including her fiancé, Edgar. Manuella, a Spanish halfbreed hopelessly in love with Ghent, causes Ruth to return to her fiancé when she insinuates that Ghent belongs to her. Ghent follows Ruth, kidnaps her, and takes her into the wilderness to endure hardship. There she discovers that she loves Ghent, and she discards Edgar in favor of him.

The Pony Express is finished as the Post Office plans to award the mail contract to a stage line. Bill and his father put in a bid for the mail, however there are three bids close together. The officials will run a race to pick the winner, and the Banton Brothers sabotage Bill's stage. Mary still believes in Bill until they try to get rid of him by holding up the regular stage with his well-known horse. Bill needs proof to clear himself and expose the bad guys.