Yossi is a Mossad agent, who was in charge of protecting Jewish-Russian scientist Anton Baklanov. Yossi is married with children and lives on a Kibbutz next to Haifa. When the KGB tried to abduct Baklanov, Yossi tried to stop them and was abducted instead. He was held by Philip until a deal was made between Israel and the USSR and he was traded in for Baklanov.