Set after the main story, this film opens as Meliodas travels with Elizabeth and reunites with his brother Zeldris, while back in Liones preparations are underway for King and Diane's wedding. The celebration is shattered when an army of fairies and giants storms the kingdom, led by the second Fairy King Dahlia and the master craftsman Dubs. The Seven Deadly Sins regroup to defend Liones against the invaders. This feature film is a standalone sequel to the television series.