The Sin in the Sleeping Forest
Meliodas, Hawk and Elizabeth travel to the Forest of White Dreams that even Holy Knights avoid. There, the Prankster Imps that inhabit the Forest of White Dreams attempt to confuse them by impersonating Hawk and Elizabeth in order to lead them away. After defeating them, they follow them and find the Serpent's Sin of Envy, Diane sleeping in the forest. Gilthunder suddenly arrives and binds all of them with his lightning magic. Meliodas battles Gilthunder, purposely allows the Holy Knight to slash him, and under the pretense of dying due to the grave wound, acquires information about the whereabouts of two members of the Seven Deadly Sins, King and Ban, as his apparent last wish.
Aired 19/10/2014EP 3 - The Sin in the Sleeping Forest
The Seven Deadly Sins
When they were accused of trying to overthrow the monarchy, the feared warriors the Seven Deadly Sins were sent into exile. Princess Elizabeth discovers the truth - the Sins were framed by the king's guard, the Holy Knights - too late to prevent them from assassinating her father and seizing the throne!
Now the princess is on the run, seeking the Sins to help her reclaim the kingdom. But the first Sin she meets, Meliodas, is a little innkeeper with a talking pig. He doesn't even have a real sword! Have the legends of the Sins' strength been exaggerated?
(Source: Anime News Network)