Slot machines have become all the rage and William 'Porker' Davis is making a fortune on all of those nickels and dimes. He soon comes under pressure from mobster Joe Bomer who's prepared to let him stay in business provided he gives the players a 70% return on their bets thereby making sure they will always come back. Davis agrees but when Bomer finds out the machines have been doctored to pay out less, Davis is soon on the run.