In a world where injustice prevails, the Holy Knights of Britannia protect their homeland with their unparalleled magic and strength. Their most sought-after targets are "The Seven Deadly Sins": a group of criminals once regarded as the strongest of Britannia's Holy Knights. Their supposed conspiracy to overthrow the Kingdom of Liones led to their defeat at the hands of the Holy Knights, but rumors persist that the seven infamous knights still live.

Ten years later, the Holy Knights ironically stage a coup d'état themselves and capture the King of Liones, installing themselves as the new rulers of the kingdom. Elizabeth Liones, the third princess of the kingdom, sets out on a journey to find the Seven Deadly Sins and request their aid when she stumbles upon a bar owned by Meliodas, the Dragon's Sin of Wrath and the former leader of the disgraced knights. The pair sets out to find Meliodas' old comrades, but will it be hope or despair that awaits them in their travels?

Nanatsu no Taizai won the 39th Kodansha Manga Awards in the shounen manga demographic category, alongside Yowamushi Pedal.

The series was published in English as The Seven Deadly Sins by Kodansha Comics USA from March 25, 2014 to January 26, 2021; in Spanish by Norma Editorial since September 26, 2014; in French by Pika Edition since March 19, 2014; in Italian by Star Comics since March 29, 2014; in German by Carlsen Manga since March 17, 2015; and in Brazil by JBC since March 21, 2015.