Morita Tetsuo, who has run out of money at a horse race, is approached by Hirai Ginji and offered a job with a daily wage of 100,000 yen. The next day, Morita carries ten boxes of oranges and is told by Hirai that the boxes contain one billion yen obtained from a fraudulent loan... This is a gambling story that depicts the exploits of men in the underworld who use their intellect and psychological warfare to amass huge fortunes.