Following World War II, Hungary came under Soviet influence. The atheist, communist regime launched its most heated battles against the Church. Father Leopold is arrested on trumped up charges, and in order to break him, he is subjected to cruel torture. His former student, Lieutenant Keller, who turned his back on religion and now believes in the socialist system, is appointed - upon the command of Major Fyodorov - to extract a confession of guilt. But the Father's perseverance and resistance changes everything.