After the Holy Knights stage a coup and kill her father, Princess Elizabeth sets out to find the Seven Deadly Sins, an outlaw band of tough knights. A princess finds a former knight at a pub and joins a quest to reunite his group of cavaliers in order to overthrow tyrants and restore the kingdom. When Gilthunder plants his sword in the center of the town and stops the village from making ale, only Meliodas can remove it, making him town savior. Meliodas, Hawk and Elizabeth travel to the daunting Forest of White Dreams, where Meliodas goes to dangerous extremes to obtain information. Diane joins the mission to free Ban from the Baste Dungeon, but the group is assailed by an enemy set on crushing the whole town and the Deadly Sins.