Everypony has fears. Everypony handles them in their own way. But for some ponies, traumatic foalhood experiences can transcend into paranoia even into adulthood. This is the case with Rainbow Dash and the dentist. Faced with an excruciating and seemingly incurable toothache, Dash is left with few options: Face one of her worst and longest-lived fears, or risk her friends finding out that their oft-proud and fearless friend is, indeed, obsessively afraid of something.