Everything about Lemmie Ferguson’s life is bright, shiny and sunny. It’s because she looks at the world in her own special way: a vivid, rainbow-hued, magical way. Lemmie’s big sister û spontaneous, sparkly Rose Rouge û calls it marshmallow magic. But there’s a dark spot in Lemmie’s life, and when a primary-school rival comes back to haunt her, the dark spot starts to grow. Now Lemmie’s marshmallow magic doesn’t seem to be working anymore. She needs to call on her sister, Rose Rouge, and her special rose-tinted spectaclesà but can Lemmie count on Rose when she needs her the most?