Del Rio, California, a once-thriving Central Valley farm town, is now filled with run-down Dollar Stores, llanterias, carnicerias, and shabby mini-marts that sell one-way bus tickets straight to Tijuana on the Flecha Amarilla line. It's a place you drive through with windows up and doors locked, especially at night-a place the locals call Cartel Country. While it's no longer the California of postcards, for local District Attorney Callie McCall, her dying hometown is the perfect place to launch a political career and try to make a difference.

But when the dismembered body of a migrant teen is found in one of Del Rio's surrounding citrus groves, Callie faces a career make-or-break case that takes her on a dangerous journey down the violent west coast of Mexico, to a tropical paradise hiding a terrible secret, and finally back home again, where her determination to find the killer pits her against the wealthiest, most politically connected, most ruthless farming family in California: her own.