When a woman abandoned by her firefighter husband for his partner's widow is threatened with also losing custody of her children, she murders her romantic rival, claiming that 9/11 post-traumatic stress syndrome prompted her actions.

The detectives are skeptical when a former street activist turned shock jock with a history of staging phony muggings to gain publicity for his causes appears to be the subject of an attempt on his life after publicly assailing a mobster, but they begin to believe his story after they discover that the married jock was involved with the mobster's mistress.

Fontana and Green are baffled by a series of flu-related deaths until they discover that the victims were given fake vaccine. McCoy goes after the con man who distributed the vaccine for murder.