It's three days until Christmas and Holly is fizzy with excitement! Her tree is a sparkle-fest, she's been to the Mistletoe Street Christmas Market and - best of all - she's met Father Christmas himself! But when Holly notices that there's one house on her street which isn't lit up, she's determined to include its elderly resident, Ivy, in the Christmas fun. And when a power cut strikes on Christmas Eve, will anyone remember Ivy? And can Holly lead her neighbours to bring joy to the whole of Mistletoe Street?