After fleeing Europe for Uruguay during WWII, Jacob Kaplan built a quiet life. Now 76, he begins to question his worth. After learning of a mysterious German prowling the shores of a nearby beach, he becomes convinced that he's found a Nazi in hiding and plans to expose him. Expertly distilling a potent mixture of emotional depth and deadpan comedy, Mr. Kaplan is a vivacious meditation on family, aging, and the drive for significance.