Morgan Mars is doing everything he can to protect humanity from alien invasion, but even his new organisation, The First Line of Defence, isn't enough to save what's already lost. Sectors are collapsing like dominoes as the aftermath of the 20th Cycle invasion leaves everyone trapped in the falling Sectors. No one knows what to do. No one, that is, except Nicholas Thistlebush.He has a plan to save Sector 6.The only question is, what will it cost him?