In Chappaqua, a hamlet just outside of New York City, two elderly widows keep house. Despite looking like grandmothers who have nothing more important to do than mop the kitchen floor, the two women originally from Afghanistan and Palestine are not who they seem. From a back room in a small secondhand bookstore attached to their house, Mrs. Abramowitz and Mrs. Silverman control the Black Widows, a worldwide terrorist organization created with a dual purpose, to wage a personal vendetta and destabilize the Western world.