Near the end of the Shōwa era, Mr. Tagami of the criminal investigation department takes the guards off of the yakuza boss Muraoka for one day, enabling Yomi Katsuichi to shoot him dead in a bowling alley.

Eto has run off with Yomi's sister Ayumi and begun a prostitution ring in Shinjuku, Tokyo.

Tagami catches Eto picking up a bag of drugs for distribution and learns that his supplier is Yoshizawa, a former member of Okumura's gang now working under the Taiwanese gangster Fang Yuan Shung.

Tagami pressures Eto to steal the drugs from an upcoming deal between Chang from the consulate and one of Fang's men and to give half of it to Okumura to cancel his debt.

Fang's henchman breaks into Yomi's house and beats the whore bloody because she won't tell him where the drugs are.

When Yomi returns she stabs the man with a piece of glass from the broken mirror then grabs his dropped gun and skillfully shoots him dead.