Something rather strange is going on in Toyland. The Noah's Ark giraffes have run away; someone has knocked a brick off the top of Noddy's house; Sammy Sailor's mast flags have been chewed and Gobbo, the goblin, says there are two very tall monsters lurking in the Dark Wood! Noddy is convinced that the culprit is "a very tall someone", and thinks he might just be able to solve all the mysteries at once..