At the turn of the millennium, Editorial Assistant Clodagh "Clo" Harmon wants to rise through the ranks at the world's most prestigious fashion magazine. There's just one problem: she doesn't have the right pedigree. Instead, Clo is a "workhorse" surrounded by beautiful, wealthy, impossibly well-connected "show horses" who get ahead without effort, including her cubicle-mate, Davis Lawrence, the daughter of a beloved Broadway actress. Clo wades across boundaries, taking ever greater risks to become the important person she wants to be. But who really is Clo underneath all the borrowed designer clothes and studied manners -- and who are we if we share her desires?