The sky has shattered like glass! From the alternate dimension on the other side, a terrible monster Baraba appeared. As Ultraman Z and the others struggle in the face of Baraba's persistent attacks, Ultraman Ace rushes to the scene for help.

A new weapon has been developed from the recovered remains of Baraba that uses the abilities of the Extradimensional Being Yapool! Haruki and the others are against using this weapon's terrible powers, but at that moment, the Brutal Space Monster Kelbim appears! The new weapon, "D4," is equipped to King Joe STORAGE Custom. Will Yoko be able to pull the trigger?!