The demons are collecting human souls, whilst Estarossa is recovering from the battle with Escanor. Pelio discovers that humans are being given to the demons, who are defeated by Meliodas. The King chooses the next Great Holy Knight.
King and Diane take refuge in the Fairy King's Forest to escape the Ten Commandments. But Gloxinia and Drole find them after a peaceful interlude.
Looking like Gloxinia and Drole, King and Diane are transported back to Britannia 3,000 years ago. There they meet Meliodas, who's fighting for Stigma.
Enraged by the events demons attack but Seriel and Tarmiel shows up and wipes out a large number of them in an instant. But as Ludociel joins the battle they are overpowered.Gowther and Melascula enters the stigma headquarters and takes over Nerobasta.
As Elizabeth succeeds in pushing back the indura form Gowther and Melascula are upto something in stigma headquarters, amidst of that Round and other humans attacks and kills everyone in stigma. As the gates open a person appears and gowther starts behaving differently.
Diane learns of the back-story of Gowther and makes a promise. King faces his final test in the realm and must make a crucial choice that Gloxinia faced 3000 years ago.
Diane in the form of Drone goes against Zeldris the executioner but soon she realises his magnitude of power. After passing the test Diane and King unite with the rest of the sins.
Gowther's past memories resurface as he is reminded by the magical heart given to him by his master. Desperate to forget them, Gowther flees and tries to erase his memories, but The Seven Deadly Sins won't make it easy for him to do so.
Merlin starts looking for Arthur but is trapped by Zeldris. Sins celebrate to their reunion but Elizabeth seems to be worried when Diane tells her about goddess Elizabeth. Merlin's condition is worsened but Elizabeth cures her and in that brief time she meets Zeldris who tells her something which in turn makes Meliodas extremely worried.
Sins come to know about the tragic lives of Meliodas and Elizabeth. They decide to go to the walled city of Coland where none other than Zeldris shows up...
The party heads to the city of Coland to dispel the distortion protecting Camelot. When Meliodas is trapped in darkness, they must fight without him.
Trapped in Melascula's magic, Meliodas breaks the magic at the cost of his emotions. Out of cocoon comes a very different Meliodas who will be confronted by the mightiest of the sin.
As things have escalated quickly this will be the final showdown among the strongest to prove who is better WRATH or PRIDE...
Meliodas still unconscious after the fight with Escanor, while Chandler proceeds to claim back his old student.
Chandler, Meliodas' former mentor, aids Zeldris. He infiltrates the Boar Hat to capture Meliodas, but the Deadly Sins stand in his way.
King prepares to face Chandler, who's returned in his demonic form. Gloxinia and Drole appear, risking their lives so the Deadly Sins can escape.
Meliodas disbands the Deadly Sins and departs with Elizabeth. But his companions aren't going to let him go without a fight, and Hawk holds the key.
Merlin faces Zeldris, whom Meliodas has ordered to gather the Commandments. Margaret, Hendrickson and Dreyfus continue their search for Gilthunder.
Having taken over Margaret's body, Ludociel appears in Liones and declares a holy war against the Demon Clan. Chandler searches for Elizabeth.
In Camelot, Arthur searches for the Holy Sword Excalibur alone. Ludociel warns Escanor to give up his Grace of Sunshine, on pain of death.
Inside Camelot, Arthur makes his last stand against Meliodas and the others. Merlin comes to his rescue, but not before he falls under Cusack's spell.
The new Holy War commences as the allied forces of Stigma face off against the Demon Clan. Derieri decides to surrender her Commandment to Zeldris.
Sensing Elizabeth's magic, Derieri appears before the Stigma army. Estarossa follows her, but Sariel and Tarmiel have other plans for him.
Estarossa professes his love for Elizabeth. When he loses control after absorbing three of the Commandments, Stigma's army faces him in a final battle.
