Anna attends a normal highschool in Scotland. She is a normal Teenager with normal Teenager problems like boys she dated, her best friend having feelings for her, her dad not approving of her gap year after school and her savage school director. But of course she can always relay on her friends when things really go bad.
It is right before Christmas and Anna is working at the bowling center to save up some money. She is also working on the day of the school Christmas show when it all begins: a massive virus breakout which turns people into zombies. By ignorance and good music Anna and her best friend go through the world unharmed and first have a little quarrel before noticing, that something isn’t right: A man in a snowman costume tries to kill them! But luckily zombies aren’t the brightest and they can escape. As soon as they know the deal they try to find other survivors and their families. They scramble off into a winterwonderland full of Christmas gadgets and always a catchy song on the lips.