Ed and his sister Roo are faced with the most boring half-term holiday in history: five days spent in the company of their elderly neighbour Miss Filey, and her ancient, smelly cat. But when they find a box of birthday candles in a cupboard in Miss Filey's house, their world is changed completely. These are no ordinary candles, every single one of them comes with a wish. There's only one problem: some of those wishes actually belong to someone else . . .