Elizabeth, the King's only daughter, sets out on a journey to find the 'Seven Deadly Sins,' and to enlist their help in taking back the kingdom. Ten years later, the Holy Knights have staged a Coup d'état and assassinated the King, becoming the new, tyrannical rulers of the kingdom. The 'Seven Deadly Sins,' a group of evil knights who conspired to overthrow the kingdom of Britannia, were said to have been eradicated by the Holy Knights, although some claim that they still live. Queen Elizabeth doesn't believe this story, and sets out to find the Sins - but when she meets the first Sin at a tavern, his name is Melodias, and he's nothing but a boy in charge of the pigs. Supposedly the strongest, most fearsome of these knights, the Seven Deadly Sins, betrayed the kingdom and made enemies of all the other knights. In a world where humans and non-humans have not yet been separated, the kingdom of Leones is protected by the Holy Knights, powerful magic users both revered and feared by the people.
