On a cold Christmas Eve night, Santa Claus and his reindeer are on their yearly mission to deliver Christmas presents to children around the world. All is going well until disaster strikes - Rudolph falls ill and suddenly Christmas morning is put in jeopardy. Father Christmas needs to find a new guide to take over the reins of his sleigh - big shoes to fill indeed! With no time to lose, he finds himself in an animal shelter where he comes across a most unlikely hero in the form of Muffin, a timid little beagle with a heart of gold. Will Muffin be able to step up to the challenge or are millions of children going to be disappointed on Christmas morning? Cheer Muffin and Santa along as this most unexpected duo fight against time to save Christmas for everyone!