Rosa, a Holocaust survivor, is an octogenarian widow who has lived alone for more than 50 years in an apartment across from the UN. When an intruder gets hold of her place, she takes him for a thief, a rapist, and then a Nazi agent. But Amaury is none of these. His mission is "to execute the greatest SOB the world has ever known." As Rosa and Amaury find themselves in shared dilemmas that threaten their lives, they must somehow meet halfway to help each other survive.