Irascible Four has to always look after his twin brother Five. But, when Five’s behaviour includes eating Four’s favorite toothpaste and polishing his ankles with Four’s favorite toothbrush, Four does the unthinkable and blurts out that he wishes Five had never been born. When Five seemingly disappears, the Monsters think that Five has gone to the hospital to “Give himself back!” The hunt is on and Four learns that a pesky Five is better than no Five at all. SHORTER VERSION: When Four says the wrong thing, brother Five disappears and they all have to find him.