By way of introduction, the film presents Avner Cohen's thesis of an Israeli "policy of opacity" ("עֲמִימוּת" amimut "ambiguity") on the basis of the case of Mordechai Vanunu. Vanunu violated Israel's taboo against talking about the country's nuclear weapons by disclosing material about Israel's secret nuclear weapons program to the Sunday Times, and was sentenced to 18 years in prison for espionage and treason. Officially, Israel denies to this day that it possesses nuclear weapons and, on this basis, does not consider itself obligated to join the Nuclear Non-Proliferation Treaty.