Glasgow, 2025. Dr Amanda Maclean is called to treat a patient with flu-like symptoms. Within three hours he is dead. This is how it begins. The unknown virus sweeps through the hospital with deadly speed. The victims are all men. Dr Maclean raises the alarm. But by the time the authorities listen to her, the virus has spread to every corner of the world. Threatening families. Governments. Countries. Can they find a cure before it’s too late? Can they stop the end of men?