The accomplished and most wanted terrorist Ansir Dasat returns to the United States to wreak havoc and mayhem once again. Along with his team they attack eight major cities posing as Heating and Air Conditioning service personnel. They target well known and vulnerable buildings each with its unique set of challenges. They rely on the lack of attention we all pay to our service man whether at home or at our place of work. When confronted by curious building maintenance custodians they simply explain that they are there to service the units. In some cases the maintenance personnel take exception. In one case they infiltrate an iconic government building, they gain access easily because the mindset of the institution within its walls believe they are invincible. That complacent attitude is all Ansir needs to win. A police officer looking to supplement his income with a second job is recruited and set up as a distraction. Ansir placed him in one of the teams. When the inevitable investigation discovers his involvement, it adds to the confusion. Detective Nicole Kegan bumps into one of the teams at her precinct headquarters in downtown Minneapolis. Her instincts kick in and she becomes suspicious about the service technicians in her building. That curiosity gets her so close to Ansir again. The harmless "Air Fresheners" they install in the Heating and Air Conditioning units are not what they seem. Once you have read this story you may pay more attention to your service personnel.