In 1946, Peggy Carter is now a secretary for the Strategic Scientific Reserve. Howard Stark asks her for help when the country believes that he is selling deadly weapons to their enemies.

Peggy may be in more trouble than usual when fugitive Howard Stark suddenly returns for mysterious reasons. And Chief Dooley chases a new clue all the way to Europe that threatens to destroy Peggy's future at the SSR.

Peggy is cornered and more vulnerable than ever as Leviathan makes their move against her. As the SSR zeroes in on Howard Stark, they may pay the ultimate price as they find their true enemy is closer than they realized.