Fin's investigation into three little girl's deaths takes him into the world of immigration, anchor babies, a grassroots opposition movement, a radio talk show host who fans the hatred, and an immigration rights attorney who is somehow tied up in everything.

One case becomes two as a murder leads to a serial rapist who is busy spreading disease along with his assaults, and the detectives' only clue is a website set up for casual and anonymous encounters.

Undercover FBI agent Dana Lewis returns to help the detectives with a case.