A villainous banker and his hired saboteurs attempt to thwart construction of Sweetwater Dam.

Racehorse-owner Dan Morgan is ruled off the track and out of racing when his horse is doped by a rival owner who knows that Dan's horse can win a high-stakes race. Trying to clear his name, Dan runs into many difficulties and incidents, including a blazing barn filled with valuable horses, before he is able to gather the needed evidence against the guilty man.

Beau Nash is a "gentleman crook" who headquarters his gang of jewel thieves in a run-down boardinghouse. When one of his gang, Mike, gets arrested, his sister Claire--aka "Lady Byron"--swears to get revenge. The gang frames Donald, the best friend of the detective who arrested Mike, for a jewelry store robbery. The detective gives Donald--and his new love, Claire--a short time to find the thieves and clear his name before he takes him in.