As a new threat looms over the Kingdom of Liones, the Seven Deadly Sins embark on a mission to confront enemies across Britannia. Splitting up, they encounter three formidable adversaries, strive to save a missing companion, and initiate the rescue of Elizabeth. Yet, hidden beneath the surface lies a complex reality. Their journey unravels the secrets behind the conclusion of the Holy War 3000 years past, leading to reunions tinged with conflict among former allies. In Nanatsu no Taizai: Fundo no Shinpan, the saga of the Seven Deadly Sins and their companions unfolds, culminating in the unleashing of a formidable power.