Finally, the Seven Deadly Sins are back together once more, and they are ready to take down the evil Demon Lord. As The Sins fight the Demon Lord's physical body, and Meliodas and Gowther enter his mind-scape in order to free Zeldris. And as a result, Meliodas must trust an unlikely ally in order to succeed. Also, Escanor takes on his strongest form to protect his friends, but he soon discovers that the power may be too much for his real body to handle.