The Seven Deadly Sins set out to catch a rare sky fish for King Bartra's birthday feast, and Meliodas and Hawk end up carried off to Sky Palace, a realm above the clouds. Its Celestial inhabitants are in the middle of the rite that has kept a demon sealed there since the Ancient War ended three thousand years ago, and Solaad, a Celestial youth with Meliodas's face, has fled the palace looking for another way to protect them. Before the rite is done, a demon force called the Six Knights of Black breaks the seal. This is the novelization of the first Seven Deadly Sins film.