Nicknamed B-4 - Big Boobs Bonnie Brown - by her childhood friends, she is the daughter of legendary San Francisco cop Bobby Brown and was raised in Battle Mountain, Nevada after her mother was bussed out of The City to avoid her demise. B-4 grew up in her mother's foul-mouthed, rowdy, rough, and colorful image. After her mother's murder, Bobby Brown came to the self-proclaimed armpit or America to see her into adulthood. Her father produced a second daughter unknown to B-4. JJ Wellington is a billionaire widow living in Washington, DC. In Battle Mountain, Bobby Brown runs B-4's dead mother's Roadkill Saloon and Lilly's Bordello. B-4 becomes an ATF Special Agent and her first assignment is Las Vegas where her sharp-shooting skills get her in trouble immediately and the target of a criminal family. Flashbacks of her mother's and father's pasts guide her as she faces dire trouble several times. In the end, Joseph Benneschott, who is B-4's mother's son, also unknown to B-4, and JJ save Bobby Brown and the "Rookie" from certain death.