Davis spent three years filming two boys in their final years of high school .
Invisible City is a 2009 documentary film by Hubert Davis about young Black Canadian men at risk in Toronto 's Regent Park district .
Hubert Davis spent three years filming two boys in their final years of high school .
Invisible City is a 2009 documentary film by Hubert Davis about young Black Canadian men at risk in Toronto 's Regent Park district .