Known as "Philadelphia's First Suburb", the neighborhood of Northern Liberties existed as a unique and independent city until 1854, when an Act of Consolidation passed by the state legislature made it a part of the City of Brotherly Love. By the time of its consolidation, Northern Liberties had earned a reputation as one of the most infamous red-light districts in the country, with streets were thronged with taverns, gambling parlors, cheap hotels and other establishments where patrons could easily procure female companionship for the right price.

At the time of the Civil War, one such house of ill repute could be found on a tiny thoroughfare known at St. John Street. The madam of the establishment was a 24-year-old woman by the name of Mary Ridey, who made headlines in 1864 after brutally murdering two brothers, Joseph and Isaac Sides, in barroom full of witnesses. Mary's murder trial became of a Philadelphia sensation, but, for years afterward, many wondered if justice had truly been served. This is the true story of Mary Ridey, one of Philadelphia's most notorious madams-- and murderers.