It began like the common cold. Then came fever, baseball-sized black swellings on the neck, and coughing up blood. Few infected lived more than two days. It was history's worst biological disaster and almost half of Europe's population died within three years. Visit the plague ships' rat-infested holds, witness the terror that swept through towns, and walk with religious flagellants. Follow a princess as she travels into the centre of the plague, a doctor who struggles to understand what is happening and a Jewish merchant caught up in violent attacks. Hear the actual words of the victims, taken from diaries and journals. From the Pope's palace to the humble huts of medieval peasants, watch as people live and die in the unforgiving grip of fear and death and wonder how we would act if such a terrible event happened today.