Reugosite has finally arrived on Earth as he begins to rampage in attempts to destroy the entire planet! Saki transforms into Grigio Regina and faces off against him in a decisive battle to end it all!

While fighting against Reugosite, she gathered all of the energy from the R/B Crystals into her own body, to prepare for a suicide takedown of Reugosite! Ultraman Rosso and Ultraman Blu suddenly appear in the midst of the battle to pressure Saki to not go through with her plan! The two Ultra Brothers stand in between them in a desperate attempt to protect Saki from Reugosite…