Wada Kōji is a chivalrous young man who leads a group of youths that take on a yakuza boss.
Nanami Ishikawa works as an editor at a publishing company. She travels Hiroshima to go after her father Asahi who left home. During her visit to Hiroshima, she learns about the tragic story of Asahi's older sister Minami Hirano. When Minami Hirano was 13 years old, she was exposed to radiation by an atomic bomb.
Former childhood friends Kadoya Kaneo and Tochino Masatatsu cross paths again. Kaneo is now a yakuza member, while Masatatsu is a nightclub owner with a distaste for crime gangs. When a yakuza boss dies, a struggle for his position takes place between Kaneo's boss Awano and the young Nakahira. Nakahira's men try to extort money from Masatatsu, bringing him in between a yakuza battle.
