스노보드에 한창 빠져있는 중학생 아들을 둔 카즈유키는 저명한 의과대학의 연구원이다. 그 연구소에서 극비리에 탄저균을 이용한 생물학 무기 K-55를 완성시킨다. 그러나 개발을 마친 연구원이 부당 해고를 당하자 탄저균을 훔쳐내 스키장에 묻어버리고 협박을 한다. 그리고 나서 범인은 다음날 교통사고로 죽어버리는데…
Burn all your heart fire. Two samurai in the wilderness. A small group belonging to the Ichienkai, the Kagawa group. Shuichi Kagawa, the son of the group leader, is released after a long sentence. He officially inherited the traces of the Kagawa group. Yoshiro is surprised to meet Shuichi, who has been in prison for a long time as a thought criminal. He was a junior who fought the student activism with Yoshiro. Around that time, there was information that Hitman, a well-known person in Kansai, had infiltrated the neighborhood. Jin instructs Kumosuke to look around. However?!
