One day on a beach, Roxy and other girls from her community encounter a woman named Kate Bush stuck in the sand.

Despite suggestion from the others that Kate Bush may be a criminal undergoing punishment, Roxy helps her and sets her free.

Roxy and her mother are held responsible and are exiled from the community, tasked with murdering Kate Bush if they wish to return.

Principal photography began on 12 November 2019, occurring over seven and a half weeks, the movie was shot with 35 mm film.

The site's consensus reads, "its overwhelming inscrutability may begin to feel more like a bug than a feature for some viewers, but After Blue is nothing if not original.