Jack Ryan investigates a secret plan to restore the Soviet Empire through war, embarking on a dangerous op with the help of Rome Station Chief Elizabeth Wright and Head of Russia House James Greer. Meanwhile, an assassination on home soil forces Czech President Alena Kovac into a dangerous position with Russia.

Jack, out in the cold and on the run after the fallout from his failed operation in Greece, must evade authorities both foreign and domestic before receiving help from an old friend.

Jack travels to Vienna to track down the source of his original intelligence on Sokol. Greer advises Alena on a key NATO deal. Petr Kovac, Alena’s father, hosts a hunt in the Czech woods.

In Budapest, Jack and Mike plan a sting on a slippery arms dealer to ascertain the whereabouts of the Sokol nuclear device, as Greer discovers some intriguing and potentially incriminating information on Petr Kovac.

Jack, Greer, Wright, Alena and Luka all work in concert to prevent the start of a third world war.

Jack digs deeper into Miller's dirty operations and learns more about Chavez. Back in Myanmar, Chao must navigate the tension in the compound to keep his family safe.

Jack, Chavez and November pursue their Croatia lead to an unsettling affair. Chao takes a mandatory trip to Geneva to speak with his boss. Greer works on connecting the two shell companies.