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 and Edgar and his family find refuge in an Edinburgh army barracks, it comes as something of a relief. His world becomes simpler, life becomes easier, things might just be looking up.

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. Accompanied by a group of misfits that include a large, hairy tattoo artist and an old man who claims to have run around Australia, Edgar must race against time and overcome his own short-comings, not to mention 100 mile canyons and a very strange council estate, to find the people he loves before he loses them forever.

A vivid, gripping story of hope, long-distance running and how we break the limits of our own endurance.