Ilya Ladogin is used to getting into all sorts of troubles. Did he, a mountaineer and rock climber, think that his usual walk in the mountains would turn into a shocking discovery? In an icy underground grotto, Ladogin discovers the long-frozen body of a young Wehrmacht officer. The diary of Oberleutnant Gunther Keller, found nearby, helps contact the officer’s daughter, 60-year-old Magda Keller, who has never seen her father. From the diary, Magda learns about his anti-fascist activities, and Ilya, having compared some facts, makes a discovery that shakes him to the core...