Magical Girl Lyrical Nanoha: Reflection is an anime film that premiered in summer 2017, produced by Seven Arcs Pictures.

About the production: the story comes from an original script, the film runs about 110 minutes and its current status is "finished".

Its main genres are action, drama, mahou shoujo, mecha and sci-fi, with themes such as Primarily Female Cast, Magic, Female Protagonist and Henshin.

On AniList, Magical Girl Lyrical Nanoha: Reflection has an average score of 73%, a good score, and appears on 6,255 users' lists.

The franchise continues in or follows from: Mahou Shoujo Lyrical Nanoha: The MOVIE 2nd A's and Mahou Shoujo Lyrical Nanoha Detonation.

A pair of researchers remain on their dying planet of Eltria with their two daughters, Amitie and Kirie, in hopes of finding a way to revive the planet, but it was no use. Against her older sister's wishes, Kirie sets off with her childhood friend Iris to seek help from a distant alternate world. They arrive in Japan on Earth to search for the key to their planet's regeneration. (Source: Anime News Network)

Official synopsis from AniList.