Ghost from 2. B about Christmas

Siblings Vítek and Anička are happy in their new class. They've made friends not only with the other pupils but also with Smudge, the little ghost from the school stove.
Christmas, their favourite holiday of the year, is approaching. Everyone is looking forward to enjoying Christmas together with Smudge. They're planning to bake gingerbread, make decorations, decorate the tree, and enjoy Christmas stories and games. But suddenly, everything starts to go wrong, and disaster is just around the corner. Will class 2. B manage to save not only Christmas but also their favourite little ghost and his stove?