Meliodas and Hawk, the captain and the pig-like creature respectively, start their journey to find Sky Fish, that Meliodas believes will help him make a great dish. This leads them to the Sky Palace, where they learn about the upcoming ceremony that is meant to prevent a powerful monster from destroying the palace. The Sky Palace is home to the Sky People, who have the ability to control and manipulate the clouds.
However, their peaceful lives are threatened by the Six Knights of Black, a group of demon clan soldiers led by the powerful Bellion. The Six Knights of Black have infiltrated the palace with the intention of removing the seal on the powerful monster and unleashing its wrath upon the Sky People.
As chaos ensues, Meliodas and his fellow comrades, including the Seven Deadly Sins, team up with the Sky People to fight against the Six Knights of Black and protect the palace. The battle is intense and filled with action-packed scenes, as each character fights to save the Sky People and defeat the Six Knights of Black.
The Seven Deadly Sins: Prisoners of the Sky is an epic adventure that takes the characters to new heights, quite literally, as they battle to save the Sky People and prevent the destruction of the Sky Palace.