Wolf Valley is in the throes of a land-grab engineered by Barlow and Taylor. The fight against them is led by Billy Carson, who is framed on a murder charge which the outlaws believe will drive him out of the territory. But instead of running, Billy surrenders and stands trial before Judge Ryan, a square shooter. After weighing the evidence, Ryan finds Bill not guilty but sentences Billy to jail for 30 days for disturbing the peace because the Judge thinks that is the only way to save Billy from the vengeance of Barlow and Taylor. But, without Billy's leadership, the settlers are helpless and ranches are burned, cattle rustled, the town is shot up, the bank robbed and the mining claim owned by Billy and Fuzzy Jones is confiscated. Ryan releases Billy who puts on a fake mustache, gets a sombrero and poses as a Mexican cattle-buyer in order to work his way into the gang.