Jim Harrison is a test pilot in the United States Air Force, one of the exalted few. He spends his days cheating death in the skies above the Mojave Desert and his nights at his friend Pancho's bar, often with his wife, Grace. She and Harrison are secretly desperate for a child, and when, unexpectedly, Grace learns that she is pregnant, the two are overjoyed. America becomes swept up in the fervor of the Space Race, while Harrison turns his attention home to welcome his daughter, Florence, into the world. But as he and Grace confront thrills and challenges of parenthood, they are met with sudden tragedy. The aftermath will haunt the Harrisons and strain their marriage, as Jim struggles to make life-and-death decisions under circumstances that are altogether new.