One evening leaving work at the law firm Dunbar, Engels, and Quinn, Alison Caldwell and her friend, Lakeesha Ellis find a lawyer shot dead on the doorstep. Alison discovers the man's death is like other drive-by shootings plaguing Center City Philadelphia over a nineteen-year span. Why was the lawyer killed? Are other staff members in danger? Who is behind these murders? Through Alison's research in the archive room at City Hall, she wonders if these shootings are related to an old unsolved murder case. Can she find out before someone else dies?