被莎乐美星人抓到的雷，得到了“异次元的雷”的帮助。 然而异次元的雷却无法控制雷奥尼克斯的血脉，进入失控状态。 另一方面，由于与假奥特兄弟的激战，赛罗奥特曼陷入了绝境。 关键时刻到来的是赛罗的老师雷欧奥特曼！ 等待丽和日向的命运是什么！？黑暗独眼赛罗的秘密即将揭开！

Zero finds himself trapped within a universal gap and faced against an impostor Ace. Following the battle, Darklops Zero was restrained once more by Herodia, remembering a figure named "Kaiser Belial" before deactivating. Rei was restrained after his failed attempt to intrude the alien base but was rescued by none other than his alternate self. Unlike the prime Rei, alternate Reimon was never able to control his powers, forced into the state of Reionic Burst until the original Rei punched Reimon, thus deactivating its Reionic Burst mode. Rei revealed that he lost his Rayblood instinct after Hyuga threw Seven's Eye Slugger, creating a scar on his chest which symbolizes the former's friendship with ZAP SPACY members. While searching for Rei, Hyuga instead finds his Neo Battle Nizer and an entrance to the alien base made by Litra. Although the fake Ace was destroyed, Zero try to find an escaped but was halted by Seven and Ultraman impostors.

サロメ星人に捕らえられてしまったレイは「別次元のレイ」に助けられる。しかし、別次元のレイはレイオニクスの血をコントロール出来ず、暴走状態に…。一方、ウルトラマンゼロは、ニセウルトラ兄弟たちとの激闘で絶体絶命のピンチに…。そのピンチに駆け付けたのは、ゼロの師、ウルトラマンレオ！レイとヒュウガを待ち受ける運命は!?そして明かされるダークロプスゼロの謎とは!?