Lawrence Jamison est le prince des escrocs. Ses victimes favorites sont les comtesses et autres marquises qui hantent les salles de jeu. Ils les séduit toutes et ses affaires tournent rond. C'est alors que Freddy, escroc aux petits pieds, lui apprend son intention de venir s'installer dans son fief, Beaumont-sur-Mer....
Yuji is an engaged businessman, who decides to grope Asuka, a pretty young girl, on a busy Tokyo commuter train. The cheap thrill turns expensive as Yuji discovers she took this opportunity to steal his wallet. Later on, Asuka finds Yuji and approaches him with an indecent partnership proposal. This film is another quality installment from the Chikan Densha Groper Train series – the longest running film series in the world. (Over 500 Groper Train films have been made!).