The twelfth sequel to the popular series "Yakuza Emblem Legend" Hakuryu and Ichizo Matsuda team up again and expand their influence from Kansai to the whole country, advancing to the top of the Yakuza organization.

The tenth 'Yakuza Emblem Legend' film.

Aoi Midori is a pharmacist and in the 8-year span of her career, she has worked according to her strong belief that "One must know the patient well in order to prescribe the correct medication as medicine is the bond that connects the patient's today to his/her daily life henceforth". Due to that, Aoi usually takes a long time in her consultations with the patients, and this causes her to be complained by her colleagues for being too inefficient in her work. Aoi shrugs off the complaints as her goal is to help the patients regain the daily life that they once took for granted.

Wakayama Tomisaburo plays the role of Ichibei. His father is denounced from his clan and murdered, his family is hamed, and Ichibei is no longer a member of the Kurokuwa ninja. Living with his daughter as a peaceful pharmacist by day, Ichibei exerts his vengeance against the powers that be in the dark of night, under the pseudonym "Fangs of Darkness". Unaware of the true identity of the burglar who's bringing disgrace upon the noble houses, the efforts to stop him are being doubled by the day. Will they ever be satisfied? Can they be stopped or will the lords be shamed in the eyes of the Tokugawa Shogun? See how far a father and his daughter can take their quest for vengeance in this action-packed tale of honor!

A young lawyer looking for a true culprit to save his innocent friend. But behind the case is the father of a woman he loves.