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牙狼＜GARO＞ 東ノ界楼
结束了在克莱亚市的战斗后，流牙为了净化铠甲而前往莱因市。 然而，映入眼帘的却是广袤无垠的沙漠。 在勉强逃过沙漠化的城市・萨冈，大量霍拉出现，异常事态让整个城市陷入混乱。 为了拯救这场危机而出在城市中的，是龙族魔戒法师・埃尔米娜与莉杏。 莉杏在与流牙一同前往克莱亚市的途中，因为龙女的召集而履行了另一项使命。 大量增生的霍拉、披着废弃物的强大敌人，以及无差别袭击的身份不明魔戒骑士。 更有神秘魔戒法师・列克托尔悄然逼近流牙——。 在愈发混乱的战斗中，流牙与莉杏仿佛被引导般再次重逢。 战斗结束后，流牙看见了旧日盟友龙女已变得面目全非的身影。 当龙女的生命走到尽头时，她告知世界将迎来巨大的灾厄。 流牙与莉杏为阻止这一切而挺身而出， 但在前方等待他们的，是作为守护者所必须面对的壮烈宿命。 动摇流牙与莉杏二人命运的战斗，即将拉开序幕。
沙漠之城·「萨甘（サガン）」，因突然出现的“霍拉”袭击而陷入了绝境。魔戒法师莉杏（南里美希 饰）与艾尔米娜（宫原华音 饰）一边救助萨甘的居民，一边驱逐着霍拉。就在这时，身披废弃物的巨型霍拉「扎古达姆（ザグダム）」突然出现，与莉杏等人展开了激烈战斗。战斗正酣时，一名“神秘的魔戒骑士”突然现身。这名骑士不仅攻击霍拉，竟然也将刀刃对准了莉杏。就在战斗陷入一片混乱之际，道外流牙（栗山航 饰）终于回到了莉杏的身边。
道外流牙将牙狼铠甲的净化工作托付给了莉杏。为寻求足以从霍拉手中守护萨冈的力量，流牙动身前往收纳着失去主人的魔戒骑士铠甲的“铠之冢”。而魔戒法师雷克托，正诡异地悄然向此处逼近...另一边，莉杏从龙族的希登口中得知，身为现任“界楼”的琉梅，所剩的时间已经所剩无几。莉杏反复回味着琉梅托付给她的那句话的深意。
雷克托揭开了令人胆寒的真相。道外流牙终于知晓了袭击萨冈城镇的霍拉的真面目，以及雷克托真正的目的。另一边，莉杏与艾尔米娜正朝着祠堂前行。面对始终纠结于“琉梅为何会选择自己作为界楼的继承者”的莉杏，艾尔米娜难掩心中的焦躁。与此同时，萨冈的长老蒙玛，在本该早已干涸的水井中，发现了涌出的奇迹之水。
莉杏落入艾尔米娜的陷阱，被封印在了异界之中。在这片诡异的世界里，充满蛊惑的试炼正执拗地向莉杏袭来。另一边，在饱受缺水之苦的萨冈城镇，阿尤拉正向道外流牙讲述自己曾被雷克托所救的过往。就在此时，莉杏放出的魔界龙幼鱼现身于此。流牙究竟能否成功夺回被囚禁的莉杏......！？
Ryuga Dougai and Rian have returned from the other world. Rian, heading once more for the shrine, confided in Ryuga her resolve to confront her unknown roots. At that time, in the town of Sagan, Monma and Ayura were shouting with joy at the well that was filled to the brim with water. Meanwhile, a mysterious voice echoes in Elmina's mind as she stands in a daze after killing Hiden. An eerie water seeps into her feet...
Ryuga Dougai and Lector fight against the countless Sand Warriors that appear. Lector was suffering from pain in his petrified left arm as a result of the forbidden ritual he had once performed to save Ayura, the "Kyuin Houga Technique." Meanwhile, Rian returns to Sentinel hall, guided by Hiden's thoughts, only to find Elmina waiting there, intent on taking Ryume's life. As each battle descends into utter chaos, a golden light finally pierces the darkness of Sagan...! And then, the Sand King Horror Garzas also reveals himself.
Reaching the gate, Rian finally stepped into the tranquil Land of Dragons. At the same time, Ryuga Dougai and lector decide to protect the gate, which is in dire straits due to the Horror invasion, as the time of the dragon's reincarnation approaches. Meanwhile, residents who drank the water turned into a mob, engulfing the city of Sagan in a sea of fire. As the two rush to the scene, Elmina, under the control of Horror Aquas, appears before them. Will Ryuga's cry reach Elmina...?
The Makai Priests desperately try to hold back the Sand Warriors who are targeting the gate. Just as Rector is in dire straits, Ryuga Dogai, who saved Elmina from the horror Aquas, rushes to his aid. The final battle between the Golden Knight Garo Sho and the Horror Garzas is finally about to begin. Will Ryuga be able to defend the Gate and the Eastern Lands to the very end...!?
