A bright young yeti finds something he thought didn't exist: a human. News of this throws the simple yeti community into an uproar over what else might be out there in the big world beyond their snowy village, in an all-new story about friendship, courage, and the joy of discovery.

The charismatic Sir Lionel Frost considers himself to be the world's foremost investigator of myths and monsters. Mr. Link only wants to find the missing branch of his sasquatch family, the yeti of Tibet, and hires Sir Frost to help him search. Unfortunately, Adelina Fortnight -- a fierce woman who has crossed paths with Sir Frost before -- holds the only map, and they are pursued by a villain hired by the Adventuring Society who would like Mr. Link's...

It's a winter wonderland on Sodor! Diesel gets a visit from some 'ghostly' Christmas engines, while Kevin enjoys playing in the snow until he's snowed under. Thomas and Cranky drop an important Christmas package and Henry faces off against an abominable snowman. Dash through the snow with Thomas and his friends as they deliver a jolly good time!