简介：KyoheiAizawa,anassassinforacovertnon-governmentalespionagegroupinJapancalledSEEK,isgrievingoverthelossofhisgirlfriendfromatragicplaneaccident.TheleaderofSEEK,RyoMikumo,contactshimforanemergencymission;saveafellowagent,recoveranewhighlyexplosiveliquidcalledRDX@,stoparuthlessYakuzaleader,SojiroKotsuki,andhisgangbeforetheytakeoverJapan.AlthoughtheNinjaswerethoughttohavedisappeared...thenewbreedofassassinsliveonhelpingtoprotectJapanandallthatisright;theNinjasarecomingsoon.