Ete and Ali are discharged from the army. Since Ete knows that his wife is having an affair, he doesn't want to go home. Ali tries to persuade his friend to stand up for himself and to kick the other man out. But since Ete obviously lacks courage, Ali himself goes into action and gets rid of the rival lover. At first, Mary and Ete seem to reconcile, but repairing their marriage won't work.
World-famous geneticist Professor Hülsenbeck is a man of integrity who refuses to mix science and political gain. When his findings are being used to harm humanity, he immigrates to the USA in 1933 in protest against Nazi racial politics.
