Ide of the Kokusai Rayon Company visits a supermarket and finds cheap shirts being passed off as his company's products. But a closer look reveals that the last letter of "Kokusai" has been changed to "n" and reads "Kokusan." The buyers, however, are all under the impression that they are buying Kokusai shirts. Ide begins an investigation to find out where the shirts are being made, but before he is able to uncover anything, he is killed on a train and his little black book, filled with secret data, is stolen. Sugino then starts a one-man search for both the killer and the factory turning out the cheap shirts.

Third film in the long-running series Daiei Studio's Woman Gambler with Kyoko Enami starring where she plays the woman gambler Ogin.

Second film in the long-running series Daiei Studio's Woman Gambler with Kyoko Enami starring where she plays the woman gambler Ogin.
In a fierce gambling den where rough men clash like sparks, two female gamblers vie for the same man in a high-stakes, best-of-seven showdown—from which only one will emerge victorious. Amid the tense atmosphere, Natsue, a highly skilled card dealer, gracefully reveals her hand with the flick of her slender fingers. At that precise moment, across the table, Takiko’s face goes ashen—she’s just lost the fateful game her lover had wagered his fortune on. The next day, Takiko and her boyfriend attempt a double suicide in despair, but she survives alone. Consumed by twisted emotions toward Natsue, a man named Isobe manipulates Takiko. Under his influence, Takiko seduces Tagami—who is Natsue’s fiancé—setting the stage for a dangerous and tangled web of love, revenge, and deceit.