Kaoru Mikogami, an elite assassin for the Imperial Intelligence, is paired with Alice, a combat android developed by the US Army. While targeting an AI researcher, Kaoru discovers the mission is a lethal trap orchestrated by the mysterious Massy Spector. Amidst the chaos of a staged terrorist attack and a ticking bomb, Kaoru and Alice begin an unlikely partnership in a world scarred by the enigmatic XINN phenomenon.