Construction worker Douglas Quaid's obsession with the planet Mars leads him to visit Recall, a company who manufacture memories. Something goes wrong during his memory implant turning Doug's life upside down and even to question what is reality and what isn't.

Assigned to oversee the development of the atomic bomb, Gen. Leslie Groves is a stern military man determined to have the project go according to plan. He selects J. Robert Oppenheimer as the key scientist on the top-secret operation, but the two men clash fiercely on a number of issues. Despite their frequent conflicts, Groves and Oppenheimer ultimately push ahead with two bomb designs — the bigger "Fat Man" and the more streamlined "Little Boy."