Kaiji Ito moves to Japan after graduating from high school. Unable to find a job and frustrated with society at large, Kaiji spends his days gambling, vandalizing cars, and drinking booze. Two years later and his life is no better. A debt collector named Endo arrives to collect money owed. The debt collector offers two choices to Kaiji: spend 10 years paying off his loan or board a gambling boat for one night to repay his debt & possibly make a boat load of money. Could the debt collector Endo actually be setting up Kaiji? One way or another, for Kaiji it's going to be the night of his life.