Yossi is a Mossad agent in charge of protecting a Jewish-Russian scientist (Anton Baklanov) who had defected to America.

Yossi is married with children and lives on a Kibbutz near Haifa. His mother survived the Pogroms.

When the KGB tried to abduct Baklanov, Yossi fought to prevent it, and was abducted himself instead.  He was held by Philip overnight in an abandoned house until a deal could be reached between Israel and the USSR, to trade him for Baklanov.