When a mysterious woman asks Carlotta to help locate her missing immigration card, it looks to be a pretty straightforward assignment. That is, until the lady disappears, and the card turns up in the possession of another woman...who just happens to be dead. Suddenly the case is far too intriguing for Carlotta to drop-and when her investigation indicates that her client was somehow connected to her inner-city "little sister" Paolina, Carlotta's got an even bigger stake in seeing it through. Alongside a handsome immigration agent with some secrets of his own, she follows her leads into the treacherous underground world of illegal aliens and those who mercilessly prey upon them. It's a lawless, dangerous territory: a place where the only thing Carlotta can rely on is her own wits, and where nothing-from innocence to life itself-is sacred...