Mafia boss, Thomas Grebbick has annoyed his superiors who send their three hit-men to kill him. To protect himself he sends his own, Ron, who kills them. In retaliation the bosses hire Golgo 13 to kill Grebbick. Whilst Golgo evades Grebbick's goons, Ron's girlfriend recognizes Golgo as her child's father from a previous sexual encounter. and she begs him to just take a glance at their child. Grebbick uses this arranges to meet Golgo to persuade him to switch sides or the child will be killed. Instead Golgo completes his contract and shoots Grebbick and Ron accidentally shoots his girlfriend whilst trying to kill Golgo. All the goons are killed leaving only Golgo and the child. After glancing at the child Golgo leaves.
組織への造反が発覚したマフィアのグレビックは、上層部が雇ったゴルゴ13の標的となってしまう。早速、部下たちにゴルゴ抹殺を命じるグレビック。そんな中、彼はゴルゴの子を産んだという娼婦の存在を知り利用しようと画策する。
