The toys want Mr Plod's birthday picnic to be a surprise but he's prowling around, on the trail of a missing kite. Noddy invents some clues to a mystery for Plod to follow and even though the goblins steal Plod's birthday picnic, he has a great day following clues and finds the culprits in the end, the goblins. Mr Plod is even more delighted when he finds out the kite is for him.