When Julianna allows Joe to flee from the hands of the Resistance, she is questioned on her loyalty, Obergruppenführer John Smith returns with news on the event that almost led to his death and Trade Minister Tagomi is overwhelmed by the vision of life if the Nazis had failed to win World War 2.

Joe learns a truth about his past that makes him question everything. The rift between Frank and Ed widens as Frank is drawn further into the Resistance. In order to assure her safety, Juliana must betray someone close to her.

Tagomi enlists Kido in a deception to save Japan from destruction. As Smith's life crumbles around him, he makes a dangerously bold play to hold onto his power. Joe tries to do the right thing but suffers the ultimate betrayal. Juliana must make a heart-wrenching choice that will shape the future of the world.

Juliana Crain makes a new acquaintance in the Neutral Zone - an Irish fixer named Wyatt - and soon finds herself on the run and seeking Tagomi's aid. The Japanese test an atomic bomb. Joe Blake is sent on a diplomatic mission to San Francisco. Kido hires a new sergeant. Nicole Dormer arrives in New York to head a new propaganda campaign. The Smiths struggle with the aftermath of Thomas' death.

Juliana embarks on a mission to stop the Nazis - a mission that reunites her with old friends. Thelma and Nicole grow closer, despite the risks. Smith learns more about the Nazis' efforts into alt-world travel. Kido demands Tagomi come clean about the films and his ability to travel. Kido coaxes crucial intelligence from Childan.

Juliana's attempt to stop the Nazis lands her in a precarious position. Himmler and John Smith lead a lavish celebration of Year Zero. Amid a series of successes, Smith faces a setback. Kido returns to San Francisco with a prize, performs an act of kindness for a friend. Tagomi makes a difficult decision. Ed returns to San Francisco and reconnects with Childan.

John and Helen host Himmler and his wife for dinner, along with a new and dangerous threat from Berlin, Obergruppenführer Goertzmann. Juliana returns to the High Castle world, arriving in the ruins of what is now known as “The District of Contamination.” Kido is forced to turn against the Crown Princess by his general. A captive Hawthorne Abendsen shares some new tales from the High Castle.

John Smith discovers that one can get lost on the path not taken. Juliana attempts to decode hidden messages from Abendsen. Amid voices of dissent, Bell devises a new strategy for the BCR. Kido must decide where his true loyalties lie, even if it costs him the Empire.

Juliana’s instincts about Helen are put to the ultimate test. As San Francisco evacuates, Kido goes in search of his son, only to find himself a captive. A letter arrives, forever changing Childan and Yukiko’s lives. The BCR receives an unexpected offer of help from the Yakuza. Abendsen condemns Smith with his final prediction.

On the brink of an inevitable Nazi invasion, the BCR brace for impact as Kido races against the clock to find his son. Childan offers everything he has to make his way back to Yukiko. Helen is forced to choose whether or not to betray her husband, as she and Smith travel by high speed train to the Portal - with Juliana and Wyatt lying in wait.