In the first edition, Dan heads to Melcombe Regis in Dorset as he traces the spread of the plague and finds out how the disease reached Britain's shores in 1348. At The Old Operating Theatre in London, Raksha witnesses the horrific symptoms of this deadly disease and the terrifying outcome for those who fell victim to it, and also investigates the recent discovery of mass graves beneath a tranquil London square.

In the concluding episode, Dan and Raksha pick up the terrifying story of Black Death six months after the first deadly outbreak in Britain 700 years ago. By January 1349, the plague had engulfed southern England, and Britain was now in the grip of the most devastating pandemic in history. As Dan and Raksha explore the spiralling death toll, they reveal how the country was gripped by fear and descended into chaos.