Edgar Hill is 35 and caught in his own headlock. Overweight slob, under-performing husband and reluctant father - for Ed, the world may as well have already ended. So when it does end in a catastrophic asteroid strike, Edgar and his family find refuge in an Edinburgh army barracks. But nothing's ever that simple. Returning from a salvage run in the city, Edgar finds his family gone, taken to the south coast for evacuation by an international task force. Suddenly he finds himself facing a gruelling journey on foot across a devastated United Kingdom. Edgar must race against time and overcome his own short-comings, not to mention 100 mile canyons and a heavily flooded west coast, to find the people he loves before he loses them forever.