It's February 1976, and Odessa, Texas, stands on the cusp of the next great oil boom. In the early hours of the morning after Valentine's Day, fourteen-year-old Gloria Ramírez appears on the front porch of Mary Rose Whitehead's ranch house, broken and barely alive. The teenager had been viciously attacked in a nearby oil field, an act of brutality that is tried in the churches and barrooms of Odessa before it can reach a court of law. When justice is evasive, one of the town's women decides to take matters into her own hands, setting the stage for a showdown with potentially devastating consequences.