For thirty-one-year old Cornelia Brown, life is a series of movie moments, and "Jimmy Stewart is always and indisputably the best man in the world, unless Cary Grant should happen to show up." So imagine Cornelia's delight when her very own Cary Grant walks through the door of the hip Philadelphia café she manages. Handsome and debonair, Martin Grace sweeps Cornelia off her feet, becoming Cary Grant to Cornelia's Katharine Hepburn, Clark Gable to her Joan Crawford. Meanwhile, on the other side of town, eleven-year-old Clare Hobbes must learn to fend for herself after her increasingly unstable mother has a breakdown and disappears. With no one to turn to, Clare seeks out her estranged father, and when the two of them show up at Cornelia's café, the lives of Cornelia and Clare are changed in drastic and unexpected ways.