For the few, it all ends at The Wall.

In a desolate future England, shrouded in perpetual smog, all technological advances have been lost. Those who have survived the terrible events of 2030 have nothing to live for but the hope their children and grandchildren might flee if only they can afford it.

For seventeen-year-old Harra, the unexpected chance of escape ends at The Wall, dividing England from its closest neighbour and jealously guarded by Border Drones.

But first, she must reach it, evading the Border Drones, which rest for only three minutes every twenty-four hours, and the road north is filled with peril that only a typed list of instructions can help her evade.

Not all have made it in the past.

Will it end at The Wall, or will Harra fail, as others have done before.