Ryu has brought Baion from Mongolia and David from the USA to Japan for the purpose of hunting Mai. In addition, he's got Hong befriending her in order to get close enough to kill her.
But killing Mai isn't enough. Ryu wants Mai's father exterminated for his knowledge of the Wisdom Alliance. And more than that, he wants Kaieda dead as well.
With Baion directing, Ryu sends David to kill Kaieda, and orders Hong to assassinate Mai. But will Hong kill the only friend he has in Tokyo? And can David get past Tsukiro and the rest of Kaieda's security to kill Kaieda himself?