 Jimmy Wakely (Jimmy Wakely) and "Cannonball" (Dub Taylor as "Cannonball" Taylor)find the body of Don Muquel after he has been shot and robbed by henchmen Ramsay (Pierce Lyden) and Sturgis (Fred L. Edwards.) Jimmy is accused of the crime by Jose Esteban (George J. Lewis as George Lewis)but the latter s rich uncle, Don Esteban (Robert Strange), clears his friend Jimmy. Jose accuses the the settlers, led by John Chambers (William Norton Bailey), of confiscating the land of the native Californians, through murder and theft. Actually, surveyor Willard Jackson (George Meeker)is making forged copies of stolen land-grant papers after his men have killed the rightful owners. Playing both ends against the middle, Ramsay urges Chambers and his daughter, Diane (Christine Larsen as Christine Larson), to drive off the Californians.