Grace Friedman is a mother, a wife, and a brilliant professor. Her bold assertions on the “absurdity” of religion have propelled her to center stage in the public debate over the existence of God. But Grace's private calm is severely shaken when her son, Tom, announces a career change from civil rights attorney to priest. When Grace falls back on her well-worn cynicism, she is suddenly at odds with the moral pragmatism of her husband, Tony, and Tom's fiancé, Ruth. Together, the family must strive to reconcile their ideological differences as they tumble toward an all-too-real catastrophe.