The Seven Deadly Sins: Prisoners of the Sky (2018)

In their quest for the mystical and elusive "sky fish," Meliodas and Hawk found themselves at a magnificent palace suspended high above the clouds. The inhabitants of this ethereal realm were in the midst of fervently preparing for a sacred ceremony, designed to safeguard their sanctuary from a monstrous creature that only stirs once every 3,000 years. However, just as the ritual was nearing its conclusion, the Six Knights of Black, a malevolent army from the Demon Clan, unleashed the beast by breaking its ancient seal. Now, the peaceful existence of the Sky Palace and all its denizens hung precariously in the balance, threatened by impending chaos and destruction.