In a glittering penthouse high above Park Avenue, two beautiful teenagers, students at an exclusive Manhattan girls' school, lie dead under suspicious circumstances. Feeling pressure from the top to solve the high-profile case fast, federal prosecutor Melanie Vargas breaks all the rules and goes undercover. Teamed with Dan O'Reilly, a hard- to-resist FBI agent with a talent for making her pulse race, Melanie embarks on a wild chase from the rarefied world of New York's elite private schools to the darkest recesses of the city's nightlife. And, ultimately, into a fight for her life against a devious killer who has no intention of getting caught.