Gustav and Fritz Kleinmann are father and son in an ordinary Austrian Jewish family when the Nazis come for them. Sent to Buchenwald concentration camp in 1939 they survive three years of murderous brutality. Then Gustav is ordered to Auschwitz. Fritz, desperate not to lose his beloved father, insists he must go too. And though he is told it means certain death, he won’t back down. So it is that father and son together board a train bound for the most hellish place on Earth . . . This is the astonishing true story of horror, love and impossible survival.