During a high stakes poker game Bat agrees to accept one-half of a lottery ticket as payment for a gambling IOU. His trouble starts when his ticket is declared the winner but the other owner is found dead without the half of the ticket.
Bat is in Tucson, Arizona during the annual National Cattlemen's Association playing poker at the Arizona Palace Hotel. The high stakes game is a four man game with an English Texas cattleman, a promoter, and a feed grain operator plus Bat. The feed grain operator Sonny Parsons out of money offers an IOU to Bat which he reluctantly accepts. After Sonny loses, he admits he is broke but offers Bat half of a lottery ticket he for which paid $100. It pays $100,000 if it wins. Bat takes half the ticket along with half of any potential winnings in payment for the IOU. After the game a woman bursts into Bat's room looking for Sonny. His sister has little use for gamblers who live off her brother. Later, as Bat puts his winnings in the hotel safe he learns the winning number 1313 is the ticket he and Sonny own. He looks for the drunk Sonny asking his sister for help. When Sonny is found dead after apparently falling out of a loft in a stable but without the half of the lottery ticket, Bat ... Written by