Patema Inverted is an anime film that premiered in fall 2013, produced by Purple Cow Studio Japan.

About the production: the story comes from an original script, the film runs about 99 minutes and its current status is "finished".

Its main genres are adventure, romance and sci-fi, with themes such as Lost Civilization, Post-Apocalyptic, Dystopian and Exiled.

On AniList, Patema Inverted has an average score of 77%, a very good score, and appears on 83,406 users' lists.

The franchise continues in or follows from: Sakasama no Patema: Beginning of the Day.

In an underground world where tunnels extend everywhere, even though they live in dark and confined spaces, people wear protective clothes and lead quiet and enjoyable lives. Patema, a princess in her underground village, loves to explore the tunnels. Her favorite place is a "danger zone" that her village prohibits people from entering. Even though she's scolded, Patema's curiosity can't be held back. No one ever explained what the supposed danger was. On her usual trip to the "danger zone," Patema faces unexpected events. When hidden secrets come to light, the story begins to unfold. (Source: Anime News Network)

Official synopsis from AniList.