The Seven Deadly Sins are elite knights with unique sins and beastly tattoos, led by the wrathful Meliodas and featuring members like the immortal, greedy Ban and the powerful mage Merlin. They oppose the Ten Commandments, a group of ten demon warriors cursed by their king with unique, fatal commandments that enforce absolute rules, such as Zeldris's Piety or Galand's Truth. Their base of operations, the ruined Edinburgh Castle, is a desolate, warped structure filled with dark energy where they await their next move against Britannia.