Menachem Begin found himself in Soviet-occupied Lithuania in 1940, several months after the German-Soviet conquest of Poland that began WWII. He found himself "invited" by the NKVD. This unwelcome encounter pitted Jew against Jew. Begin had been betrayed by Jewish informers (p. 27), and his NKVD interrogator identified himself as a Jew. (p. 29).
During the interrogation, Begin noted that, in his youth, he had first been a member of Shomer Hatsair [Hashomer Hatzair], which he identified as a pro-Soviet Zionist party. (p. 53). Later, Begin switched to the Betar.
The NKVD interrogator spilled out a torrent of harangues derived from Communist ideology: Zionism was a tool of the capitalists and the British. Zionist organizations siphoned Jews off from the real struggle, which was class warfare. Etc. Etc.
Begin tried to respond rationally to the accusations, to no avail. Zionism was a liberation movement among the Jewish people, not a tool of the capitalists or the British. In fact, Zionism had existed for many centuries--long predating capitalism, the bourgeoisie, etc. (p. 64).
The author was dispatched to the Pechora area of Siberia. In time, word came about the "amnesty" offered to Poles following the Nazi German attack on their erstwhile Soviet ally. Begin found a spot in a very overcrowded ship. He eventually travelled on land across southern Russia. He claims that the Anders Army did not want Jews at all (not true), and glosses over the desertion of Jews in Anders Army in Palestine.