Ulla Chiaki, the leader of the Hound, appears on national television and accuses the Vipers of killing his fellow members. Jimmy, an AGS technician, assisted Kariya in escaping from AGS custody with the assistance of a hacker named Ageha. The Viper members gathered together in an abandoned warehouse off the grid in order to avoid being caught by AGS security forces and law enforcement. In order to find out who was responsible for framing them as terrorists, Saiki leads the Vipers in storming AGS headquarters to reacquire their Maneuver-Blades. Norma is seemingly killed to hold off VTOL jets by ramming her Maneuver-Blade against them after being wounded by Utsugi, one of the kidnappers who had been the mastermind of kidnapping her daughter.
ウラによるヴァイパー糾弾演説が始まった。
ウラはユニット･ヴァイパーによってハウンドのメンバーが虐殺されたと宣言。
ハウンド虐殺の容疑者として指名手配されるユニット･ヴァイパーの面々。
逃走を図る彼らは追い詰められるが、天才ハッカー・アゲハの助けにより、難を逃れ廃工場に集結した。
そして、アゲハが差し出したディスクに収められた映像を見て衝撃の事実を知る。
すべての陰謀を潰すことを決意したサイキが重い口を開いた･･･
「マニューバ・ブレード」を奪う――ユニット･ヴァイパーの反撃が始まった！
Ulla Chiaki, líder dos Hound, aparece em rede nacional de TV e acusa os Vipers de matar seus companheiros.
