Like other large cities, Miami, known for its beautiful beaches, nightlife, and cuisine, suffers from an ugly undercurrent of violence. AJ Docker is forced to face off with that subculture when a gang invades the emergency room and brutally murders one of his patients in front of him and threatens Doc himself. After he surmises that a woman and her young son may be next on the hit list, he and Banshee, his well trained service dog, embark on a search for the killers to protect the innocent woman and child. As he investigates, he realizes the threats of further violence stem not only a local gang, but also international terrorists. When Doc and Banshee interfere with their horrific plans, the killers set their sights on Doc. In a harrowing race for survival, Doc and the killers track each other down, while Doc helps a close friend navigate a complex, life-threatening medical emergency.