Naruto: Shippuuden is the continuation of the original animated TV series Naruto. The story revolves around an older and slightly more matured Uzumaki Naruto and his quest to save his friend Uchiha Sasuke from the grips of the snake-like Shinobi, Orochimaru. After 2 and a half years Naruto finally returns to his village of Konoha, and sets about putting his ambitions to work, though it will not be easy, as he has amassed a few (more dangerous) enemies, in the likes of the shinobi organization; Akatsuki.

[Source: Anime News Network]

Demons that once almost destroyed the world, are revived by someone. To prevent the world from being destroyed, the demon has to be sealed and the only one who can do it is the shrine maiden Shion from the country of demons, who has two powers; one is sealing demons and the other is predicting the deaths of humans. This time Naruto's mission is to guard Shion, but she predicts Naruto's death. The only way to escape it, is to get away from Shion, which would leave her unguarded, then the demon, whose only goal is to kill Shion will do so, thus meaning the end of the world. Naruto decides to challenge this "prediction of death."

[Source: Anime News Network]

Naruto school special.

Naruto is a new cool student and when he meets Sasuke they start fighting.

A mysterious group of ninjas makes a surprise attack on the Konohagakure, which takes great damage. The nightmare of another Shinobi World War could become a reality. Sasuke, who left Konoha to kill his brother, Itachi, appears for the second time in front of Naruto at an unknown location to prevent it from coming to fruition.

[Source: Wikipedia]

Ninjas with bloodline limits begin disappearing in all the countries and blame points toward the fire nation. By Tsunade's order, Kakashi is sacrificed to prevent an all out war. After inheriting charms left by Kakashi, Naruto fights through friends and foes to prevent his death while changing the minds of those who've inherited the will of fire.

[Source: Anime News Network]

Assigned on a mission to capture Mukade, a missing-nin, Naruto Uzumaki sets out for the once glorious historic ruins of "Ouran", where he pursues and corners the rogue ninja. Mukade's goal is revealed to be a dormant leyline within the ruins; he unleashes the power of the leyline, causing a light to envelop Naruto, sending him into the past, 20 years before the series began. When Naruto awakens, he comes into contact with the Fourth Hokage, Minato Namikaze.

[Source: Wikipedia]

After being captured for attempting to assassinate the leader of Kumogakure, the Raikage, and killing Jounin from Kirigakure and Iwagakure, Naruto is imprisoned in Houzukijou, a criminal containment facility also known as the Blood Prison.

The master of the castle, Mui, uses the ultimate imprisonment jutsu to steal power from the prisoners. In this place, something is aiming for Naruto's life. The battle to prove his innocence and uncover the truth has begun for Naruto and his friends.

[Source: AnimeAvenue]

Ten years ago, a gigantic demon beast known as the Nine-Tailed Demon Fox was released from its jinchuuriki by an unknown shinobi wearing a mask. The village of Konohagakure was close to destruction by the attack of the Nine-Tails, but the village was saved by its leader. Minato Namikaze and his wife Kushina Uzumaki—who was the jinchuuriki at the time of the attack—sealed away the demon inside their new born son: Naruto Uzumaki. However, this act of saving the village cost them their lives and they left the future of the ninja world to Naruto.

With the demon fox sealed away, things continued as normal. However, the peace of the village would not last long, for Pain, Konan, Itachi Uchiha, Kisame Hoshigaki, Sasori, Deidara, Hidan and Kakuzu—members of a dreaded shinobi group called the Akatsuki—attacked Konohagakure. Naruto narrowly manages to launch a counter-attack but why have these shinobi appeared when all of them were meant to have died? The mystery remains, but the shinobi are praised by heir families for completing such a dangerous mission. However, one of them who has never known the faces of his parents, Naruto, cannot help but feel lonely. At that exact time, suddenly, the masked man makes his appearance in Konoha. Naruto and his allies are both attacked by the man's mysterious new doujutsu.

[Source: MyAnimeList]

Original Anime will feature the "unbelievable appearance of a certain popular character."