Tillie and her friends are invited to spend Christmas in Cornwall with Tillie and Louie's Grandparents. They visit the old tin mine and have body board lessons with Rob and Brendan, They have so much fun and you can smell the salt in the air. But why are the people who live in the sea-side village of Welloe-Rock bay so strange? After spending a spooky night out with the boys at the most haunted place in England, Tillie and her friends are whisked into a world of weirdness when the Christmas decoration spring to life. Tillie finds she is 'the chosen one'. Can she help the weird Christmas tree characters and stop the world from crumbling?