In the second episode of Mystery Map, Julia travels to Berkeley, Gloucestershire, to investigate what may have caused a strange rain to fall in August 2012. Julia meets eyewitnesses who describe seeing roads covered in seaweed and talks to experts who try to explain the mystery. She also visits Topsham in Devon, to explore the story known as the 'Devil's Footprints'. In February 1855, it was reported that unusual, cloven-heeled prints appeared in the snow in single file, leading up to the door of Clyst Saint George. The footprints scaled up walls and onto rooftops and continued for over 100 miles. Julia investigates whether these prints were a result of a prank or something more sinister. Finally, Julia finds out more about spontaneous human combustion and carries out an experiment to recreate the mysterious occurrence. Also this week, Ben visits Nottinghamshire to find out about an extraordinary happening in 1980 where 300 children, at a marching band competition marching band, all ...