Enjoy fairy-tale-style fun with the Whiskers Sisters! Maya has antlers. Mia's a cat. And May can't talk yet. But they're all family! They live in the woods with their grandfather, the Guardian of the Forest. A letter from Mrs Owl, the Whisker Sisters' mail carrier, prompts Mia and Maya to plan a celebration. But their little sister, May, has been swept up in Mrs Owl's mailbag! Soon May's in the woods, organising the local animals to find a collection of lost letters. But will she make it home in time to join her sisters at the party?