The Seven Deadly Sins the Movie: Prisoners of the Sky is an anime film that premiered in summer 2018, produced by A-1 Pictures.

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

Its main genres are action, adventure and fantasy, with themes such as Shounen, Demons, Magic and Super Power.

On AniList, The Seven Deadly Sins the Movie: Prisoners of the Sky has an average score of 69%, a good score, and appears on 90,998 users' lists.

The Seven Deadly Sins travel to a remote land in search of the phantom ingredient "sky fish." Meliodas and Hawk end up at a "Sky Palace" that exists above the clouds, where all the residents have wings. Meliodas is mistaken for a boy who committed a crime and is thrown in prison. Meanwhile, the residents are preparing a ceremony for defense against a ferocious beast that awakens once every 3,000 years. But the Six Knights of Black, a Demon Clan army, arrives and removes the seal on the beast in order to threaten the lives of the residents of Sky Palace. Meliodas and his allies meet the Six Knights of Black in battle. (Source: Anime News Network)

Official synopsis from AniList.