Rose Gibbon’s husband has been missing for two years. Devastated, she sells her home. The next day, local authorities investigate an abandoned car at the intersection of Westland Avenue and Hemenway Street in Boston. All the blood recedes from her face; she knows it’s her husband’s car!

Meanwhile, Medical Examiner Natalie Principal arrives at the crime scene to inspect a charred body behind the wheel. The victim falls apart when she touches it. Since the car doesn’t show traces of fire, Natalie’s afraid the victim was exposed to a deadly dose of radiation. She informs the ATU—Anti Terrorism Unit—about a possible terrorist threat of a dirty bomb. As the investigation continues, digital footprints are erased, and people vanish into thin air . . . a deadly race to save Natalie’s friends is about to begin.