Having earned a tidy sum from the sale of some cattle they drove, The Three Mesquiteers reluctantly send the gambling addict Lullaby Joslin to bank their cheque from the sale. Lullaby wins Elmer, a ventriloquist dummy at a crooked carnival by cheating at a game of Three Card Monte, replacing all his cards with Aces. Lullaby and Elmer are on a roll and arrive at the bank just after it closes.
During the night the bank is robbed, the Three Mesquiteers stay on to help the bank, including Tucson Smith taking the place of a champion in a prize fight, and apprehend the robbers who hid the money in a ghost town.
