Place your bets! Koji Himuro (Akira Kobayashi) is a makeout artist with unparalleled gambling skills. Shortly after his return to Tokyo, he is invited to attend a reception being held at the Suvenian Embassy of Tokyo. This “reception” was an undercover gambling operation that was run by an international gambling syndicate. Up against a cardsharp by the name of Inumaru and his mistress Reiko, Koji plays a flawless game of Seven Bridge. Outraged by his loss, Inumaru orders Reiko to stalk Koji like a shadow.