KyoheiAizawa,anassassinforacovertnon-governmentalespionagegroupinJapancalled"SEEK",isgrievingoverthelossofhisgirlfriendfromatragicplaneaccident.Theleaderof"SEEK",RyoMikumo,contactshimforanemergencymission;saveafellowagent,recoveranewhighlyexplosiveliquidcalled"RDX@",stoparuthlessYakuzaleader,SojiroKotsuki,andhisgangbeforetheytakeoverJapan.AlthoughtheNinjaswerethoughttohavedisappeared...thenewbreedofassassinsliveonhelpingtoprotectJapanandallthatisright;theNinjasarecomingsoon.
