In his work, The Coat, Nadav relates the story of his great-grandmother's cousin, Olga, who lived in Lvov, Poland. When the Germans were about to invade the
city in World War II she advised her family to flee. They refused and Olga fled
to Warsaw, where she could not find work because she did not have suitable credentials. Olga went to the Gestapo and asked for a certificate. When the German refused to issue it to her, she offered to undergo a test that would "prove" her Aryan origin. Olga displayed determination before the skeptical German and received the certificate. At the end of the war Anti-Semitism made her realize that she should leave Poland. She contacted the Aliyah B people, who helped Jews immigrate illegally to what was then Palestine, and even assisted
them in their activities. Her activity was discovered and she hurried to immigrate to Kibbutz Matzuva.
Nadav chose to present the story on a coat, symbolizing Olga's long journey during World War II. On the coat Nadav wrote Olga's story and pasted a picture of Olga, her daughter, and the life-saving certificates.