Kamen Rider Build ve Kamen Rider Zi-O'nun yeni bir Kamen Rider Film Savaşı (genel olarak onuncu) çapraz filmi ve Heisei Generations Series'in üçüncü bölümü.

Kamen Rider Sonsuz Nesil

An old house stands amongst newly built buildings, as if it has been left behind. Tamako, a popular fortune teller, has been living there alone with her son, Tadao, for years. Because he has intellectual disability and autism, their neighbors often complain about his unpredictable behaviors. One day, Tamako is informed that a room is available in a group home owned by a company that runs the community workshop Tadao works at. Residents there all have intellectual disability but are living together to be independent from their families. Tamako decides to let Tadao move into the group home, but the sudden change of environment confuses him.

The Lone Ume Tree

Middle-aged Fumi lives a quiet seaside life, she spends her days working at a small local factory, spending time with her neighbor’s son, and attending her sober-lifestyle group. One night while driving home her car is struck by a small meteorite, the odds of which are 100 million to 1. Seeing this as a good omen, Fumi decides she should be open to new possibilities in her life, even perhaps romance…