The series is inspired by true events of British nuclear bomb tests in the 1950s at remote Maralinga, in outback South Australia. Major Leo Carmichael, an Australian Army Engineer and WWII hero, has to keep the base functioning smoothly. Testing the most dangerous weapon in the world is no easy task with Commanding Officer, who is not fit for purpose, new meteorologist Dr Eva Lloyd-George, who starts asking questions, and the federal government and press watching his every move.