In the aftermath of an apocalyptic world war, humanity shares the earth with sentient robots and the population has fractured into countless tiny enclaves, each with their own customs and laws and linked only by the Sailrail network. Feuds and wars rage between these enclaves on a near-constant basis and human-robot animosity is on the rise. Enter Jack Wardog, a man with a hole in his mind, his memories wiped, and, in their place, an explosive charge with a timer display bonded to his forehead. Jack is a bombhead, taking suicide missions with near-impossible deadlines...