When Kaiji is told there have only been two winners of the Bog, Hyōdō and Tonegawa, he realizes that the game must be rigged. He then agrees to work with Sakazaki for 10% of the possible ¥600 million payout from the Bog, however Sakazaki is secretive about the details of his plan which includes the machine's maintenance schedule. A day before their attempt to beat the Bog, Sakazaki appears with ¥50 million he 'borrowed' from the company president's safe where he works as a security guard. At the appointed day, Sakazaki commences to play the Bog.

Kaiji realizes too late that the lean they created in the building also tilts slightly to the left, possibly eliminating his chances of a ball dropping into the rear winning hole. Also, with Ichijō now tilting the machine back to the front, the clogged balls may soon drop out. He is now in a race against time before the money runs out. Finally, two balls head for the winning hole, but unfortunately knock each other away.