While Tom Fuller, son of Pop fuller, rescues Bronco from a watery grave, a rider brings mail to Pop at the cattle drive's camp and to see when the cattle will arrive at Solcito. One of the letters is for Tom from Molly Corley who now lives in Solcito. She was supposedly engaged to Tom but married John Corley. Pop tears up the letter but tells Tom about it when he arrives along with Bronco and the water they need. Tom decides to ride ahead to Solcito to see Molly against Pop's wishes so Pop asks Bronco to ride with him to keep an eye on Tom. Bronco joined the drive late as he happened to be headed to Solcito anyway. In town, Tom dumps Bronco to see Molly while Bronco looks up the local law handled by Judge Claymore as there is no sheriff. Bronco tells him he is working for Pinkerton looking for a man in the area. The judge tells him the man may be in a nearby town. Meanwhile, events lead to the bank being robbed, Tom jailed and escaping, John's murder by Molly and Tom taking the blame ...