Signal 30, the police designation for crime scene with extreme or imminent danger, is a riveting mystery about the intricacies of a major crime investigation. The terror builds as the investigators follow the unknown path of an insane bomber who continues to move one step ahead of their search, forcing them to face the reality of living in a time of terrorism. In a quiet suburb of New Jersey, a 12 year old girl returns from Christmas vacation and finds an unopened gift at her front door. In the excitement and exuberance of a young child, she opens it. The early evening is shattered as the gift explodes and begins a tangled search for the person who would send this destructive present. Unexpectedly, other devises show up at a shopping mall in New Jersey, the Holland Tunnel in New York, and the home of the Mayor in a nearby town. Detective Shane Murphy, a 40 year old senior officer with Special Case Investigations, is thrown into the maze of confusion as he attempts to sort out the facts before the perpetrator strikes again. While his personal life crumbles around him, as his wife informs him of her decision to pursue a divorce, Murphy finds assistance with the arrival of Stacy Landou, a 38 year old Special Agent with Alcohol, Tobacco and Firearms. Their relationship grows slowly, professionally, yet passionately as they try to solve a crime out of control.