SPOILER ALERT: the following article contains massive spoilers, including the ending. If you have not yet seen the movie, proceed at your own risk, or better, come back to this article later!
SPOILERS AHEAD
The Seven Deadly Sins: Cursed by Light Plot Summary and Synopsis
With the help of “Sin of Wrath” Meliodas and the worst rebels in history, the Seven Deadly Sins, the “Holy War”, in which four races, including Humans, Goddesses, Fairies and Giants fought against the Demons, is finally over. At the cost of the “Sin of Pride” Escanor’s life, the Demon King was defeated and the world regained peace. After that, each of the Sins take their own path; the first being the “Sin of Gluttony” Merlin, who works together with King Arthur aiming to create a new kingdom.
Source: Wikipedia (CC BY-SA 3.0).