Thumpus Wumpus is a remarkable telepathic animal who lives in a wild forest near a tiny isolated village. Two children, Tesh and Tash, who live in the village, one day get lost in the forest where they are helped by Thumpus, discovering they can talk to each other without speaking and they soon become good friends. They and the other villagers begin a series of exciting adventures which end up with all the villagers making an enormous trek across the forest, to escape the Duke's army - who come to cut the trees down. Finally they end up in a place which seems like the other side of the world....