Diane joins the mission to free Ban from the Baste Dungeon, but the group is assailed by an enemy set on crushing the whole town and the Deadly Sins.

Golgius tries to seize the sword from Elizabeth and Meliodas; the sound of a mysterious bell drives the group to fight each other.

Elizabeth and Meliodas must fight Holy Knights Friesia and Ruin to proceed to the dungeon. An omen foretells of disaster on its way to Britannia.