The Gokaigers were captured by the Zangyack remnants after departing to the Zangyack homeworld to destroy the empire once and for all. The Gokaigers, now working for the newly reformed Zangyack empire, return to Earth with a black Gokai Galleon and attack the Go-Busters in search of five phantom Ranger Keys which will unlock the "Greatest Power in the Universe". During the fight with the Gokaigers, the Go-Busters are able capture Navi, who tells them that the Zangyack are also working with Vaglass and that they must go back in time to save the other members of the Super Sentai Teams and defeat the alliance of Zangyack and Vaglass.

After the 39th and 40th Astroswitches are developed, Amanogawa and Subaruboshi High Schools hold a test transfer of some of AGHS's students to SBHS, which causes problems when the Aries Zodiarts makes itself known to the AGHS students. Kamen Rider Fourze: Climax Episode is the director's cut version of the combined episodes 31 & 32 of the Kamen Rider Fourze TV series.

Uchida Mayu is a high school student in a peaceful town near Tokyo. She suffers from violence from her stepfather and plans to run away to her uncle's home in Tokyo. As she is about to board the last bus to Tokyo, a terrible looking old person causes her to miss the bus. She attempts to walk across a ridge. Meanwhile, Mayu's uncle Uchida Kazuki is a freelancer writer. He chases after the hideous monster Yoshie who attacks people. Kazuki receives a phone call that his niece Mayu ran away. He begins a search for her and finds her cellphone on a mountain path. He sees Yoshie's picture on her cellphone.

A school teacher suggests to his class that they ought to raise a pig together and eat it when it grows up.

The film features the remnant Ayakashi who seek to revive Dokoku Chimatsuri, but instead revive the Goseigers' nemesis Buredoran of the Comet as the Gedoushu Buredoran Chimatsuri. To make matters worse, Takeru Shiba has been brainwashed into serving Buredoran as Gedou Shinken Red.

Seiji Hasumi is a popular English teacher in a private high school. He is also a violent and sociopathic killer who concocts an extreme plan to deal with the rise of bullying and bad behavior among the student body.

The film features the remnant Ayakashi who seek to revive Dokoku Chimatsuri, but instead revive the Goseigers' nemesis Buredoran of the Comet as the Gedoushu Buredoran Chimatsuri. To make matters worse, Takeru Shiba has been brainwashed into serving Buredoran as Gedou Shinken Red.