Two gun buffs go shooting in the southern Arizona desert. They are found dead, their bodies riddled with bullets. Pima County detectives Juan Caldera and Sam "Junior" Collins work the case with the help of their colleagues, Barbara Sanchez and Richard Grogan. They discover that the victims had a history of bullying members of the Fantasia Homeowners Association. Members of the HOA, as well as Calderas' team, cannot believe that someone would commit murder over trivial HOA arguments, but Juan cites a case where such a murder occurred in the Phoenix area. He nevertheless has to consider alternative theories. Were the victims involved in gun or people smuggling across the nearby Mexican border? Were they "Minutemen" attempting to intimidate wannabe immigrants from Mexico or minutemen sympathizers who were killed for some reason associated with such activities?
When more deaths occur in the HOA, the puzzle becomes complex.