The revolution of bats

A more than a century-long nuclear winter has forced the inhabitants of Madrid to live underground in the subway tunnels, now renamed 'La Madriguera' (The Warren). The high command of the new state exerts power on citizens by turning light into the scarcest, most precious commodity. So much so, that some people have undergone a genetic mutation and are losing their eyesight while their other senses are increasingly developing. They are called Bats and, to put an end to tyranny, are willing to let themselves get caught so they can access the command station post.