Protecting a witness could be a deadly mission for this K-9 team.

K-9 officer Tarren McGregor never imagined that a cartel would find its way to Texas’s South Padre Island — or target his best friend’s sister. But when Julia Hamilton witnesses and prevents the kidnapping of a teen girl, Tarren knows that trouble is soon to follow. Because Julia didn’t just protect the girl — she saw the abductor’s face. Now she’s marked for murder, and it’s up to Tarren and his K-9 partner to keep Julia safe from the human traffickers in pursuit…even if it means putting themselves in the line of fire.