A late-night call from her boss sends federal prosecutor Melanie Vargas to a vast Park Avenue apartment where two beautiful teenagers, students at a posh East Side girls' school, lie dead under suspicious circumstances. As determined as she is smart and ambitious, Melanie will do what it takes to get to the truth. But it's tough for a woman to focus on work when she's paired with a hot cop who has a talent for making her pulse race. Heeling pressure from the top, Melanie needs answers fast. Breaking all the rules, she goes undercover on a hunt that takes her into the darkest recesses of the city's nightlife--and into the hands of a devious murderer with no intention of getting caught.