one night, you be get a new job as Hollow Raider after join on HIA (Hollow Investigation Agency). you be task to roam Ballet Twin city to find some goods to be useful back on New Eridu, yet suddenly you drop off your MP3 Pod on the floor. the music be attract something beyond your expectations, which that's group of Ether Mutants.

standing in front of you, is two Ether Mutants which like Marionette. their be seen you as quick make dance ballet but be weird is because their legs is sharper and cut someone with ease. You remember one of report about them be called as Twin Marionette, a group Ether Mutants who killed many Hollow Raider on Ballet Twin, make you shock and scared because your life is dangerous now.