In 1844, the peace of Feudal Japan is threatened by cruel Lord Naritsugu Matsudaira, who is politically rising and getting closer to his half-brother, the shogun. After the harakiri of the Namiya clan leader, samurai Shinzaemon Shimada is summoned by the shogun's advisor Sir Doi of the Akashi Clan to listen to the tragedy of Makino Uneme, whose son and daughter-in-law have been murdered by Naritsugu. Then Sir Doi shows a woman with arms, legs and tongue severed by Naritsugu and she writes with her forearm a request to Shinza to slaughter Naritsugu and his samurai. Shinza promises to kill Naritsugu and he gathers eleven other samurais and plots a plan to attack Naritsugu in his trip back to the Akashi land. But the cunning samurai Hanbei Kitou that is responsible for the security of his master foresees Shinza's intent. Shinza decides to go with his samurai through the mountain, where they find the hunter Koyata that guides them off the mountain and joins the group. Now the thirteen men prepare an ambush to Naritsugu and his army of two hundred samurai in a suicide mission to stop evil.
In Tokyo, Shigeharu Aoyama is a widower that grieves the loss of his wife and raises his son Shigehiko Aoyama alone. Seven years later, the teenage Shigehiko asks why his middle-aged father does not remarry and Shigeharu meets his friend Yasuhisa Yoshikawa, who is a film producer, and tells his intention. However, Shigeharu has difficulties to approach to available women to date and Yasuhisa decide to organize a sham audition for casting the lead actress for the fake movie. They receive several portfolios of candidates and Shigeharu becomes obsessed by the gorgeous Asami Yamazaki. Despite the advice of the experienced Yasuhisa, Shigeharu calls Asami to date and he falls for her. But who is the mysterious Asami?
As sadomasochistic yakuza enforcer Kakihara searches for his missing boss he comes across Ichi, a repressed and psychotic killer who may be able to inflict levels of pain that Kakihara has only dreamed of.
Japanese-Brazilian Mario and Chinese hairdresser Kei are lovers. Kei is about to be deported. He manages to escape. His plan is to get passports and stow away on a ship headed for a foreign country. With his girlfriend he tries to steal money from the mafia. Instead he gets cocaine which he sells. But Kei is captured by Yakuza and he must save her...
In the ruthless underground world of the yakuza, no one is more legendary than boss Kamiura. Rumored to be invincible, the truth is he is a vampire-a bloodsucking yakuza vampire boss! Among Kamiura's gang is Kageyama, his most loyal underling. However, the others in the gang view Kageyama with disdain and ridicule him for his inability to get tattooed due to sensitive skin. One day, assassins aware of boss Kamiura's secret arrive from abroad and deliver him an ultimatum: Return to the international syndicate he left years ago, or die. Kamiura refuses and, during a fierce battle with anime-otaku martial-arts expert Kyoken, is torn limb from limb. With his dying breath, Kamiura bites Kageyama, passing on his vampire powers to the unsuspecting yakuza. As he begins to awaken to his newfound abilities, Kageyama's desire to avenge the murder of boss Kamiura sets him on a course for a violent confrontation with Kaeru-kun, the foreign syndicate's mysterious and seemingly unstoppable leader!