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.

Ban searches purgatory for Meliodas. King, Deriri and the others head to Heaven's Theater to rescue Elizabeth, who's been abducted by Estarossa.

Reunited once again, Ban and Meliodas prepare to face the Demon King, who they suspect holds the key to their escape from purgatory.

With Wild now an ally, Meliodas brings Zeldris' tragic past to light as the newly formed trio make their way towards the Demon King.

Meliodas grapples with suddenly losing his memories of Estarossa. Zeldris, Chandler and Cusack threaten to overpower Merlin and the others.

Gowther reveals that his creator, the real Gowther, cast a forbidden spell on Mael and all those who knew him to end the Holy War 3,000 years ago.

Gowther takes on Mael to protect his friends. Diane also joins the battle, but the Archangel's power level continues to rise as he nears his final form.

Mael changes form after absorbing four of the Commandments. King soon overwhelms him with his Spirit Spear, but Gowther tries to save the Archangel.

Meliodas and the others have to defeat the Demon King before they can escape Purgatory and make their way to the world of the living.

Chandler and Cusack merge to form the all-powerful Original Demon. Merlin gives up any hope of victory, but Mael and King soon come to her aid.

As Meliodas absorbs every last one of the Ten Commandments, Merlin attempts a forbidden spell to stop the birth of a new Demon King.

Merlin's spell thwarts Meliodas' transformation. The Holy War seems to be over, but Elizabeth senses something is still terribly wrong.

Escaping purgatory, Ban faces the Demon King, who now possesses Meliodas’ body. Elizabeth and the others make their way into the spirit world.

Peace returns to the Kingdom of Liones. Although Elizabeth is still under a curse, Meliodas assures her there is a way to break it.

Now that Meliodas is the Demon King, he cannot remain on earth. Though his friends acknowledge his fate, they are unable to accept it.

Merlin rescues Elizabeth, who barely evades a falling boulder on her way to the Demon Realm with Meliodas. The Sins realise the Demon King is alive.

Elizabeth and Meliodas face the Demon King, who now possesses the body of Zeldris. Meanwhile, the Sins clash with a beast summoned by the Demon King.

With Escanor's aid, Meliodas and Gowther reach the spirit world, where they aim to split the Demon King and Zeldris back into their own bodies.

Diane destroys the source of the Demon King's magic. Meanwhile, Escanor continues fighting the Demon King at full power, exceeding his limits.

Escanor converts all of his life energy into magic to defeat the Demon King. Meliodas pleads with his comrade to stop, but Escanor refuses to listen.

Zeldris and the Sins corner the Demon King in both realms, but the King separates from his son's body and possesses Britannia itself as his new vessel.

The long-fought Holy War comes to a dramatic end. Peace returns to the Kingdom of Britannia once again, but a new threat looms on the horizon.

The Sins are shocked by Merlin's longtime deception. Meanwhile, Merlin declares that Arthur has been recognized as the King of Chaos.

A vicious beast in his true form, Cath attacks the reawakened Arthur. Now separated from the Sins, Merlin attempts to take on the monster herself.

Arthur's battle with Cath comes to an epic conclusion. The Seven Deadly Sins go their separate ways as peace returns to the world once again.