Set in the expansive Japanese community of Sao Paulo in Brazil - the largest Japanese diaspora in the world - "Yakuza Princess" follows Akemi (Masumi), an orphan who discovers she is the heiress to half of the Yakuza crime syndicate. Forging an uneasy alliance with an amnesiac stranger (Jonathan Rhys-Meyers) who believes an ancient sword binds their two fates, Akemi must unleash war against the other half of the syndicate who wants her dead.