In Brazil, Akemi finds out that she's the heiress to the Yakuza empire. Just after that, her destiny enters a spiral of violence and mystery, where a gaijin (foreigner) who’s been protecting her all this time, Shiro, may have been actually sent to kill her.
The heiress to half of the Yakuza crime syndicate forges an uneasy alliance with an amnesiac stranger who believes an ancient sword binds their two fates. She must unleash war against the other half of the syndicate who wants her dead.