Israel's victory in the Six Day War brought a feeling of euphoria and superiority to its people. The resounding triumph also created a feeling that future political problems might be solved through military dominance.

Siege takes place during this era of national confidence. Tamar is an Israeli woman whose husband has been killed in the Six Day War. Her husband's army buddies want her to keep his memory alive, and mourn him as a respectable war widow should. But Tamar wants to move on with her life, raise her young son, and enjoy the fruits of the Israeli victory. When she meets a new man, one of her husband's friends secretly arranges to meet him, as if to decide whether he approves. The psychological games take their toll on Tamar, until she finds a way to break from her past.