Veronica Walsh is 15, fashion-minded, fat, and friendless. Her summer job in the Consignment Corner section (Employees Only!) of a vintage clothing store is a dream come true. There Veronica can spend her days separating the one-of-a-kind gem garments from the Dollar-a-Pound duds, without having to deal with people. But when two outrageous yet charismatic salesgirls befriend her and urge her to spy on and follow the mysterious and awkward stock boy Veronica has nicknamed the Nail, Veronica's summer takes a turn for the weird. Suddenly, what began as a prank turns into something else entirely. Which means Veronica may have to come out of hiding and follow something even riskier for the first time: her heart.