It's 1946, and peace has dealt Peggy Carter a serious blow as she finds herself marginalized when the men return home from fighting abroad. Working for the covert SSR (Strategic Scientific Reserve), Peggy must balance doing administrative work and going on secret missions for Howard Stark all while trying to navigate life as a single woman in America, in the wake of losing the love of her life (Steve Rogers). Peggy needs Howard Stark to eliminate Zero Matter as they are faced with a mission none of them could come back from. Peggy desperately tries to save Dr. Wilkes with a dangerous plan to stop Whitney Frost. But Thompson makes a surprising move that could destroy them all. 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. As Peggy plots a rescue mission, Whitney hunts for even more dark power; and Jarvis learns he should not make promises he cannot keep. When Peggy realizes she needs help saving Wilkes, she turns to an unexpected adversary for help while Whitney tries to control the deadly Zero Matter.