The Seven Deadly Sins the Movie: Prisoners of the Sky is available in: English European Spanish French German Japanese [Original] on Netflix Netherlands
劇場版 七つの大罪 天空の囚われ人
Traveling in search of the rare ingredient, “sky fish” Meliodas and Hawk arrive at a palace that floats above the clouds. The people there are busy preparing a ceremony, meant to protect their home from a ferocious beast that awakens once every 3,000 years. But before the ritual is complete, the Six Knights of Black—a Demon Clan army—removes the seal on the beast, threatening the lives of everyone in the Sky Palace.
The Seven Deadly Sins aid the Sky People against a powerful group of demons hellbent on resurrecting a demonic beast sealed over 3,000 years ago.
An excellent movie, I consider this movie as an excellent piece of animation of all times._italic text_