The official website for the previously announced Nanatsu no Taizai Movie has launched and announced that it will premiere in Japanese theaters on August 18 this year. Titled Tenkuu no Torawarebito (Prisoners of the Sky), the movie will feature an original story written by mangaka Nakaba Suzuki. With a slight change in staff members as listed below, Keigo Sasaki will return as the chief animation director as well as character designer and Hiroyuki Sawano will compose music for the movie at A-1 Pictures.

Synopsis
To celebrate the king's birthday, the seven sins go out to hunt for sky fish, a phantom ingredient. Meliodas and Hawk have gotten flown at the Sky Castle, a place that exists above the clouds. Residents of the Sky Castle, the Winged People, mistake Meliodas as a wanted criminal and he subsequently gets thrown into a jail. During Meliodas' time at the Sky Castle, the Winged People are organizing an important ritual to prevent the awakening of an ancient beast that happens every 3,000 years. A demon army lead by Belrion come to jeopardize the ritual and threaten the lives of the Winged People. In order to protect them, the seven sins face the group of demons and fight.

Staff
Chief Director Noriyuki Abe (the Arslan Senki (TV) series)
Director: Yasuto Nishikata (Killing Bites)
Script: Makoto Uezu (the Yuuki Yuuna wa Yuusha de Aru series)
Production: Gekijouban Nanatsu no Taizai Production Committee

Teaser

Note: The video is region-locked; click here for an alternative link.

Official site: http://www.7-taizai-movie.net/

Source: Moca News