It's Ed and Sarah's first night at their new home - an isolated farmhouse on the Scottish borders. This should be a new beginning away from their stressful London lives. And at first it is; come sunset they fall in love all over again on a wander in the woods. But as darkness falls, Sarah suspects they're not alone, Ed goes to investigate and quickly, the evening becomes a nightmare. It suddenly dawns on them; they do not belong here. And they certainly aren't welcome either....

An estranged couple's vacation to save their troubled relationship goes awry when they find themselves under attack from the walking dead