A filler episode: Naruto convinces Sasuke and Sakura to help him discover what's behind Kakaships mask. Just what blemish does he hide? When the group invites him out for ramen - their treat - he is immediately suspicious, but happily enjoys the free meal. Just as they're about the see Kakashi's true face, Ino, Shikamaru, and Chouji crash the party, blocking their view. When the chaos settles down, both ramen servers are staring at Kakashi with big hearts in their eyes.
This of course fuels the genin's curiosity, so they decide to follow him. He immediately notices they are tailing him and asks what's up. They then decide to follow him individually. Naruto is up first, but Kakashi quickly loses him. Sakura tries but is duped by a Kakashi scarecrow. Finally Sasuke tries and fails as well.
Today's mission is to help out on a farm. As they prepare, the evil Moya brothers are plotting their revenge on Kakashi. Three years ago, one of the brothers proposed to a girl in a very cheesy setting. Kakashi interfered. Now they will seek their revenge.
Their first method of revenge is to prepare a magnificent feast sprinkled with a potion to cause unstoppable hiccups. Kakashi refuses to eat while Naruto throws a tea pot at his sensei. Kakashi blocks with the entire table and all the food is ruined.
Sasuke decides that if they invite Kakashi to a bath, he'll definitely take off his mask, while the Moya brothers decide to prick Kakashi with a needle that will make him laugh uncontrollably until he dies. To the boy's dismay, Kakashi walks out with his mask on. The Moya brothers use the opportunity to throw their needle, but it misses and hits a frog. When Naruto comes out of the path, he sees the three Moya uniforms and steals them.
Finally, the kids make their last stance. They put on the shinobi outfits and try to sneak up behind Kakashi. He immediately recognizes them, but the Moya brothers emerge from hiding and confront Kakashi at that moment. Sakura reveals that this was part of their plan all along - they've lured the Moya brothers into their trap. Kakashi thinks it's a bit strange but takes the three out.
Finally, Naruto asks what's under Kakashi's mask. He dramatically removes it to reveal... another mask!