Mum, Dad, Holly and Zak are so excited when it starts snowing. Rushing outside, they build a snowman, complete with button eyes, a carrot nose, and stones for a mouth. On Christmas Eve, the children are woken by a blinding light in the back garden. Another snowman stands in place of theirs – and he’s alive! Holly and Zak are taken on an adventure to Lapland, but everything is not quite right. Winnie the witch is furious, and is about…