The first television anime of the manga premiered in Japan in October 2014, and ended with 24 episodes. A four-episode television anime special titled The Seven Deadly Sins -Signs of Holy War- premiered last August. Netflix later streamed the full first series with both English and Japanese audio as a Netflix original series, and announced that it will stream "season 2" on February 17.
Funimation describes the story:
When Holy Knights arrest her father and sisters, Princess Elizabeth seeks out a group of legendary warriors known as the Seven Deadly Sins. Once revered, the Sins betrayed the kingdom and became fearsome fugitives that no man is willing to face—a far cry from the heroes this princess needs. Finding the Sins is no easy task, and Elizabeth's journey takes her to a small tavern where she collapses in front of a short, unassuming man and his talking pig. Helpful, albeit perverted, the barkeep reveals that he's actually Meliodas, the Dragon Sin of Wrath—captain of the Seven Deadly Sins! Agreeing to help her, the two travel the countryside in search of his companions. But their journey pits them against dangerous creatures and the treacherous, power-hungry Holy Knights who plan on eliminating the Sins for good.Tomokazu Tokoro (Hellsing Ultimate, Haibane Renmei) directed the television special at A-1 Pictures. Yuniko Ayana (Girls Beyond the Wasteland, Hello!! KINMOZA) writing and overseeing the scripts, and Yuichiro Kido (Gatchaman Crowds insight) also wrote the scripts. Keigo Sasaki returned to design the characters, Tomoko Sudo (animation director for Oreshura, Silver Spoon) was the chief animation director, and Hiroyuki Sawano and Takafumi Wada composed the music.
Nakaba Suzuki's original manga also bundled two original video anime projects in 2015. A new television series has been announced, but no information on a full new season has been revealed