In the year 2030, London is recovering from a disastrous flood, which some say was caused by climate change. When a controversial talk-show host is murdered, suspicion falls on radical activist Ben Martins. Ben may be innocent, but he has no sympathy for the victim, and risks becoming embroiled in ever more dangerous schemes. If protecting the planet can justify anything, is Ben a pragmatist or a terrorist? And why does CCTV footage of the murderer show someone dressed distinctively like Ben? As friends and loved ones become involved, Ben’s thinking and loyalties are tested. Caught on the hard edge of radicalism, he must make choices that will affect the rest of his life – and the lives of those he has never even met.