The ten Sailor Guardians have gathered for the final battle. However, the Queen of the Dead Moon, Nehelenia, attacks with the power of her "nightmares". While Helios uses his last ounce of strength to save the Earth, Usagi is drawn into Nehelenia's nightmare, but is encouraged by the strong heart of Tuxedo Mask. Joining forces with her fellow Super Sailor Guardians, she transforms into Eternal Sailor Moon. Finally, all "Eternalized" Sailor Guardians have gathered.

Bishoujo Senshi Sailor Moon Eternal serves as the fourth installment in Toei Animation's reboot of Naoko Takeuchi's original magical girl manga. The sequel was announced in January 2017 as a part of the franchise's 25th anniversary and later confirmed to be a two-part anime film covering the Dream arc. (Source: MAL News)

After overcoming numerous tribulations, the members of Roselia promised to appear on FUTURE WORLD FES. It is now Autumn... Through writing the lyrics of "Promise," Lisa has matured. Watching the change of color in the autumn leaves, Yukina and Sayo expressed their resolve in a picture letter to their future selves. Driven by the wish to do something for Roselia, Rinko has started to compose a new song. "The remaining quests are the contest, the tournament, and FUTURE WORLD FES..." Reflecting on their goals, Ako starts to feel anxious.