Catholic priest by day and crazed vigilante by day, Michael O'Bannon is a survivor of the Gulf War, where he acted as Marine Corps Chaplain. He is placed as head clergyman of St. Mark's Cathedral, which is located in a poverty-stricken and crime riddled neighborhood in Boston. His one wish is to help the people surrounding him, but there is a darker part of himself that is taking hold and seeking vengeance.