The path of Saul the angry zealot to Paul the servant of Christ, who will pay any price to bring his message to the world.

University lecturer Neil Tannahill is drawn into a sinister conspiracy involving secretly-stored Soviet nuclear waste at a remote British nuclear facility after receiving an enigmatic note from legendary atomic scientist and one-time former head of "Doomwatch" (the infamous Scientific watchdog group of the seventies), Dr Spencer Quist.