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 faces the full fury of Leviathan, as Howard Stark makes his return.

Peggy’s search for the truth about Zero Matter puts her on a collision course with her superiors as Howard Stark barnstorms in.

As Agent Carter plots a rescue mission, Whitney Frost hunts for even more dark power, and Jarvis learns not to make promises he cannot keep.

Peggy and Sousa propose a trade with Whitney Frost, while the SSR gets help from Howard Stark that may be the key to eliminating Zero Matter.

Peggy needs Howard Stark to eliminate Zero Matter as they are faced with a mission none of them could come back from.