In a medieval realm that resembles Europe's ancient past, Britannia's Holy Knights wield extraordinary magical powers and are highly respected and feared for their role in defending the region and its kingdoms. However, a notorious group of Knights, the "Seven Deadly Sins," were accused of disloyalty to their country and a coup against Liones' reigning monarch. Despite the Holy Knights defeating them, speculation persisted about the Seven Deadly Sins' survival. Years thereafter, the Holy Knights orchestrated a coup, establishing themselves as Liones' oppressive rulers. Nanatsu no Taizai, an adaptation of the best-selling comic book series, traces Elizabeth's journey, the third princess of Liones, as she pursues the Seven Deadly Sins to reclaim her kingdom from the oppressive Holy Knights. Intent on bringing justice to an unequal society, Elizabeth embarks on a mission with her new companions to vanquish the Holy Knights and restore equilibrium to the land.