Kei keeps her truck rolling day after day, always thinking of her young daughter, Iku, who lives apart from her. Kei’s protégé, Maako, also drives a truck to pay her little sister Mio’s school fees. One day, Kei spots Mio taking money from a middle-aged man. Not long after, word comes that Maako has quit her job…

When the mobster Iwaida Nishikawi is executed by the hit man Takeshi, his family chases the killer. Takeshi's brothers Takashi and Hideshi Miwa try to find Takeshi, who is hidden with the nurse Rie Ishibashi, to protect him and Hideshi discovers that Takeshi was secretly sent by their Yakuza boss to eliminate Iwaida. Meanwhile, the mobster Kenmoshi abducts Takashi's wife Mariko and rapes her, trying to force Takashi to deliver his brother to him.