Run, Omoi!

is episode 320 of the Naruto: Shippūden anime.

Summary
Headquarters receives information that Omoi abandoned his post on the battlefield, and quickly contacts Kakashi, who confirms the information, A starts believing he could have deserted but Karui came in his defence putting that idea aside, Sai adding the extra information that he could be going towards the Seventh Front where the Amphibious Search and Destroy Unit was being bailed by the Thundercloud Unit that never got to its destiny, and he was concerned with this supply unit composed by children. Omoi contacting the Headquarters promises to rescue the children in one hour. Hoping they were celebrating when he gets there, the Headquarters send a Naruto's clone to help him against the two thousand White Zetsu Army. When at the Seventh Front, Omoi only found Kirigakure-nin corpses and countless White Zetsu clones, Naruto's clone appears in time to help him against that many opponents, but an oversight of Omoi makes Naruto's clone disappear and he gets all alone again against multiple enemies. Advancing through the enemy defences, Omoi is faced with a White Zetsu affected by the red soil that expelled a poisonous smokescreen. On the other side was the Thundercloud Unit led by Yukai, hidden in a statue near a lake, resisting the enemy, while Omoi going in their rescue gets rid of various White Zetsu clones with a lightning bolt under the water they decide to come out and fight, side by side with Omoi they destroy all the enemies, A contacts Omoi and informs that he failed his one hour mission and is going to get punished for that.