Max Brogan (HARISON FORD) and Hamid Baraheri (CLIFF CURTIS) are U.S. Immigrations agents and partners who raid various locales in the greater Los Angeles area rounding up illegal immigrants. Max is world-weary and has a reputation for going soft on some he apprehends, such as Mireya Sanchez (ALICE BRAGA) who begs for him to retrieve her young son, Juan (ARAMIS KNIGHT), at daycare, before she's deported.
After his initial reluctance to get involved, he finds and returns the boy to his Mexican grandparents, and then sets out to find and reunite Mireya with her boy. Hamid, on the other hand, is a bit more hard-nosed, despite being a naturalized immigrant himself, especially toward his sister, Zahra (MELODY KHAZAE), who he and his brother, Farid (MERIK TADROS), consider an embarrassment to their family. He must also eventually contend with Yong Kim (JUSTIN CHON), whose pending naturalization ceremony might just be derailed by his somewhat hesitant involvement with a gang of thugs who are trying to indoctrinate him into their criminal ways.
Gavin Kossef (JIM STURGESS) and Claire Shepard (ALICE EVE) are also facing deportation, and have some sort of romantic past together. He's a musician and atheistic Jew from Britain who's trying to fake being a religious music teacher so that he can stay in the U.S., while she's an Australia actress whose papers have expired, leaving her in dire straights.
Things look up for her -- in an unsavory way -- when she runs into Cole Frankel (RAY LIOTTA), a green card adjudicator. Noting her beauty, he proposes that he'll expedite her paperwork, complete with her exaggerated, front of the line status, in exchange for two months of sexual rendezvous. That's despite him being married to Denise (ASHLEY JUDD), a defense attorney for such immigrants who's trying to help find a mother for a young Nigerian orphan, and then gets involved in the case of Taslima Jahangir (SUMMER BISHIL).
She's a 15-year-old high school student whose recent report and viewpoint on the 9/11 terrorists have not only outraged her classmates and teacher, but also drawn the attention of the FBI and specifically Special Agent Phadkar (JACQUELINE OBRADORS) who wants to deport her and her parents, Rokeya (NAILA AZAD) and Munshi (SHELLEY MALIL). As the various stories play out, the plight of the illegal immigrants as well as those who both hunt them down and try to help them comes to a head.