A Japanese tale of murder, hold ups and car chases. Naoko Kimura, a woman with a history of spontaneous violence, unintentionally murders her husband on the same night she learns of the whereabouts of her long lost half-sister. Believing her sister to be the victim of a mass kidnap scheme, Naoko and her closest friend, Akari Sato, resolve to travel across the length of Japan with no transportation and a pittance to their name in order to find her. All the while, they are subjected to a manhunt by the national police force.