Billy feels like a square peg in a round hole. And Olie, being the best friend that he is, devises a square world for them to play in, much to Billy’s delight. / Zowie’s harmonica is accidently ‘lost’ by Spot, which creates havoc in the Polies’ household as the furniture and appliances band together to retrieve the harmonica for Zowie. / Olie and Billy learn that life without rules isn’t always a fun or good thing.