The Superhero Twins are a set of 8-year-old identical twin sisters named Miley and Mira, and they love to dress like superheroes! Miley's hero name is 'Cotton Candy Fairy', while Mira's hero name is 'Fireburst Fairy'. The twins attend a one-classroom all-girls boarding school where everyone dresses in their very own unique superhero outfit! They have a 22-year-old teacher named Miss Mayson whose hero name is 'Beautiful Butterfly', and six other 8-year-old classmates named Maya (Leapfrog Girl), Margaret (Speedy Swimmer), Maria (Blizzardette), Maddison (Electric Queen), Melody (Ballerina Beauty) and Mary (Princess Puffy)! They also share their classroom with a 22-year-old supervillain teacher and 8 eight-year-old supervillains: Miss Murphy (Yellow Magic), Megan (Toxic Queen), Melissa (Fire Sprite), Monique (Electric Spark), Maisie (Star Shooter), Molly (Lunar Cow), Minerva (Dark Enchantress), Muriel (Cheetah Girl) and Mabel (Mosaic Kid), each with their own unique villain outfit!