After a bride-to-be becomes violently ill at her bridal shower in Philadelphia, Dr. Connor and his NIH team glove up and suspect a lethal form of anthrax is in play as more patients pile up -- and unless they quickly connect the dots to the source, a local newspaper will publish a news story that could terrorize the entire city. As Connor, Dr. Durant and their crew get vaccinated, they suspect the victims somehow came into contact with tainted animal products, and a sickly Nigerian man could provide their best clue.