Once revered as the strongest Holy Knights in the Kingdom of Liones, the Seven Deadly Sins were accused of inciting rebellion and murdering their superior. Branded as traitors, they scattered across Britannia for ten years to avoid capture. However, when the remaining Holy Knights incite a coup d'etat and the truth about the incident begins coming to light, the Seven Deadly Sins must unite to save the kingdom they once served.
Bandit Ban (the Fox’s Sin of Greed) and Fairy “King” Harlequin (the Grizzly’s Sin of Sloth) are bound by their connection to Elaine—King’s sister, Ban’s lover, and the Guardian Saint of the Fountain of Youth. The magical water grants immortal life to whoever drinks it. As she lays dying, Elaine gives the last of the liquid to Ban, granting him immortality and the power to stop a demon that destroys the Fairy Forest, resulting in King believing Ban stole the liquid himself after killing Elaine. The vengeful tension comes to a head when Ban and King finally recross paths ten years later…