The Ninja Monkeys infiltrate the Valley using an ancient kung fu move that tricks the mind rendering them practically invisible. Only the empty-headed Ox can see the invaders. Skunk, with Ox's special sight, save the day. But the next day, Skunk fills Ox's head with how heroic he is Ox loses his ability to see the monkeys. It's up to Skunk to return Ox's to his No Mind state.