The Invisible Monster Neronga appears to consume electricity while appearing and disappearing at the same time. STORAGE were sent to deal with the monster. Haruki struggles with Neronga, which absorbs the electric power of Sevenger. STORAGE devises a new strategy to defeat Neronga. Will Haruki and Z be able to capture Neronga?

Anti-monster robot force STORAGE's new asset, Special Craft No. 2, Windom, is finally complete. However, a problem with its energy charge prevents it from being launched. Meanwhile, the Subterranean Monster Telesdon rampages on the surface! Even worse, Telesdon is given a boost by a mysterious power! Can STORAGE and Ultraman Z overcome this challenge?!