Juliana recognizes that her and Tagomi's fates are intertwined. Tagomi and Admiral Inokuchi realize the Reich is imposing a covert oil embargo on the Pacific States. Reichsmarschall Rockwell and J. Edgar Hoover plot against John Smith. Helen starts therapy to cope with her grief over Thomas, and takes drastic action to protect her family. Kido and Tagomi clash over Juliana.

As the Reichsführer continues to provoke the Japanese Pacific States, Juliana barely escapes a deadly situation and discovers a trove of Nazi secrets. John Smith tangles with his political adversary. The Nazis prepare for "Year Zero." Joe and Juliana come to a turning point in their relationship.

With Wyatt's aid, Juliana flees San Francisco with the stolen Nazi secrets. Childan can finally return home; Ed decides to stay in the Neutral Zone. Tagomi makes revelations to Kido that change Kido's perspective. John Smith's career takes a turn.

Juliana realizes time might be running out, but recruiting supporters continues to prove challenging. Tagomi finds himself in a dangerous life-or-death struggle. In therapy, Helen Smith crosses a line. Kido pursues his target in the Neutral Zone.

Juliana and Wyatt's mission takes them farther east and dangerously close to the center of a top-secret Nazi project. Trying to improve relations between their sides, Tagomi reaches out to Smith. Smith makes a crucial discovery. Kido finds closure.

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.

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.