When Billie was eight years old her father was murdered. Ever since that day, she has vowed to bring every criminal to justice, especially the man responsible for her father's death. Twenty years later, Billie is still on a mission to rid the streets of criminals. If she can't do it legally, then she takes matters into her own hands. Her boyfriend, Walter, is a hard-nosed detective in the Philadelphia police department. Together they are on track to become the power couple in Philly - that is, if no one finds out about Billie's secret.