No Graves on Boot Hill

Three men meet in the same prison and in their cell they find a Mexican boy condemned to death for murder One night the three convicts are mysteriously released by a priest and the father of the Mexican boy who promises them a reward of 30000 if they can find the real murderer within ten days Certain that the Mexican boy is not guilty Reno and the others organize a plan which leads to the unmasking of the real killers