The apartment is the home of Mary-Jo Cassidy, located in Little Haiti. The apartment also becomes the home of Mary-Jo's sister Louise Cassidy-Williams and her daughter, Mary-Beth, after Louise leaves her husband, Marty. The apartment is small but comfortable and rather lush, indicating that Mary-Jo might be better off economically than her sister.
It is from this location that Louise and Mary-Jo give their missions to protagonist Victor Vance.
A Regina will usually spawn outside the apartment, presumably owned by Mary-Jo herself.