The “Seven Deadly Sins”—a group of evil knights who conspired to overthrow the kingdom of Britannia—were said to have been eradicated by the Holy Knights, although some claim that they still live. Ten years later, the Holy Knights have staged a Coup d'état and assassinated the king, becoming the new, tyrannical rulers of the kingdom. Elizabeth, the king's only daughter, sets out on a journey to find the “Seven Deadly Sins,” and to enlist their help in taking back the kingdom.
Episode 1
The third princess of the Kingdom of Liones, Elizabeth, finds Meliodas, who is the owner of the Boar Hat bar and is also one of the Seven Deadly Sins. With her identity revealed, she is pursued by Twigo whom Meliodas easily defeats. The princess joins him on his journey to find the other Deadly Sins in order to defeat the Holy Knights, who have orchestrated a coup d'état and have overthrown the king.
Episode 2
When Gilthunder plants his sword in the center of the town and stops the village from making ale, only Meliodas can remove it, making him town savior.
Episode 3
Meliodas, Hawk and Elizabeth travel to the daunting Forest of White Dreams, where Meliodas goes to dangerous extremes to obtain information.
Episode 4
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.
Episode 5
Golgius tries to seize the sword from Elizabeth and Meliodas; the sound of a mysterious bell drives the group to fight each other.
Episode 6
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.
Episode 7
Ban, Meliodas and company have finally reunited. Seeking a clue to the location of the Grizzly's Sin of Sloth, they head to the Capital of the Dead.
Episode 8
King and Ban have a final showdown. Holy Knight Guila battles Meliodas, Diane and Elizabeth. Ban remembers Elaine and the Fountain of Youth.
Episode 9
Elaine finally persuades King to rescue Meliodas and the others. Back in the capital, malcontent starts to stir among some of the Holy Knights.
Episode 10
Upon learning the fighting festival's grand prize, Gideon; Meliodas, Ban and King decide to participate, as do Holy Knights Howzer and Griamore.
Episode 11
In the final match of the festival's first round, Ban reflects on the first time he met Meliodas. Veronica and Griamore search for Elizabeth.
Episode 12
During the last match of the festival, the venue breaks out in pandemonium when a group of Holy Knights attacks.
Episode 13
Enclosed inside the Goddess Amber, Meliodas breaks free and reappears. Not his true self, he begins attacking his allies as well as his enemies.
Episode 14
Meliodas and his pals begin a new search for the remaining Seven Deadly Sins. The Holy Knight Helbram dispatches assassins to crush the Armor Giant.
Episode 15
Just as the attack overtakes the Armor Giant, Gowther appears, taking unexpected action. Elizabeth learns of Meliodas' past and the existence of Liz.
Episode 16
Elizabeth's words convince Meliodas to fight, and it becomes clear who stole his consciousness. Hendrickson begins to resurrect the Demon Clan.
Episode 17
When Elizabeth is kidnapped, Meliodas, Ban and Gowther launch an attack on the capital. Meanwhile, King Arthur of Camelot confronts Hendrickson.
Episode 18
Diane has a brush with death while protecting Zeal. Howzer and Guila are forced into a struggle against formidable magical powers.
Episode 19
The King reminisces over some old memories of a time Diane and King spent together when Diane was still a giant child. Back to the present, King fights Hellbram, while in a different location Hendriksen fights Arthur.
Episode 20
In order to take Elizabeth back, Meliodas teams up with Arthur to fight a fierce battle against Hendrickson and Gilthunder.
Episode 21
Ban explores the catacombs under the city. Merlin and the other sins go to the chamber where the king Baltra and Elizabeth are being held captive. Dreyfus has a confession.
Episode 22
Ban attempts to kill Meliodas, but is stopped by Hawk. Meliodas and the sins corner Hendriksen and prepare to take him down.
Episode 23
Pursued by the Seven Deadly Sins, Hendrickson makes two finds that give him the ultimate Demon power.
Episode 24
Just when it seems as if the Seven Deadly Sins will be defeated by Hendrickson's overwhelming power, Elizabeth's power returns to her.
