England has been radically changed by a series of catastrophes – large cities have disappeared and London has been replaced by a lagoon. The surviving population exists in fortified towns where they cling to traditional ways, while strangely evolved beasts prowl the wilderness beyond. Conformity is rigidly enforced and those who fall foul of the rules are persecuted: some are killed, others are driven out into the wilds. Only a few fight back – and two of these outlaws, Scarlett McCain and Albert Browne, display an audacity and talent that makes them legends.