The story follows Erika Hoshino, an English teacher whose falsified resume has been exposed. During a home visit to Yoko Takamizawa—the mother of a troubled student—Erika becomes entangled in a cash-in-transit heist involving 150 million yen, carried out by former U.S. Marine James Hunt. Erika has a history with Hunt: six years ago, he was the driver who hit and ran over her younger sister. Seeking both revenge and to save her student, she engages in a gunfight with Hunt.