A story set in the dream world, depicting the Kasukabe Defense Forces and the Nohara Family fighting against a nightmare trouble. One day the people in Kasukabe come to be able to have dreams they want in their sleep, after having a strange dream in which a giant fish swallows them. The people enjoy having their own distinctive dream in the dream world, but the world gradually changes into a nightmare world. Shinnosuke Nohara and Kasukabe Defense Forces members let Saki Nubatama, a girl who moves in Kasukabe, join the group, and they go into the dream world to explore the cause of the nightmare.

(Source: Manabu Tsuribe)

Falulu is far away in the heart of the PriPara world in Puransu. The sparkle is disappearing from the idol sacred ground PriPara, and Falulu sends an SOS message to Laala and her friends. If the sparkle doesn't return, the PriPara world itself will disappear. Laala and her friends try to help Falulu, and they work together to save the PriPara world.

The movie will feature special guests such as popular familiar characters from the TV anime series and the latest Youkai from the upcoming Youkai Watch 2 sequel games.

The story on Arcadia's mystery, on which the 13th television episode was based.