Breathe if you dare. English countryside, 1958. The idyllic village of Olney St. Mary has stood in its peaceful location for over 900 years. Until one day, when two teenage boys are struck by a mysterious illness. The newly arrived Doctor Hilary Newton suspects a common flu to be the cause of their malady. Before long, the doctor and residents of Olney St. Mary are plunged into a nightmare, as the disease ravages the local population. Despite the doctors employing the latest medicine available, the death toll keeps rising. Someone in the village knows the reason behind the pestilence that has struck at the heart of the village, but can the medics learn the truth before it's too late, or will they join the growing list of names that appear on the death roll in Olney St. Mary?