Rosie is a bright and optimistic girl who loves to share her light with the world. But one day, she hears: "You're not my friend." Confused and hurt, Rosie starts to feel sad and wonders whether she's done something wrong.

As she struggles with these big feelings of worry and sadness, Rosie remembers something important-her sunshine. Her confidence, kindness, and ability to stay true to herself are what make her special. With the help of her mum and her own inner strength, Rosie learns to face her fears and be brave in the face of hurtful words. Rosie learns that she is as important as others and allows herself to put her needs first.