It’s 1959 and Russia is winning the space race. In order to compete, The United States forms NASA and chooses to recruit the nations best test pilots to form what will become the Mercury Astronauts. Among these test pilots are the golden boy John Glenn, the reckless Alan Shepard, and Gordo Cooper, whose broken marriage could cost him a place at the program.

The press descends upon the domestic lives of the astronauts. Shepard and Gordo wilt under the limelight while Glenn thrives. Glenn secures a deal with Life Magazine that grants exclusive access to all seven astronauts in return for life-altering compensation. By the time the astronauts arrive in Florida to begin work, even Shepard has come to understand the power they now hold.

After a rocket malfunctions during a test, the Mercury 7 head home for Christmas. Shepard’s holidays are fraught, as the arrival of his parents coincides with the adoption of Louise’s niece. Gordo’s former mistress forces her way back into his life, jeopardizing his relationship with Trudy. And Glenn attempts to win over a rising political star and presidential hopeful, JFK.