Yvette Fielding and the team explore Mary King's Close, a 17th-century building in Edinburgh reported to house the spirits of victims of the plague. A child's head, a severed arm and a girl in a blue dress are among the spooky phenomena to have been spotted there. Nestle deep beneath the Royal Mile in Edinburgh there's a hidden a labyrinth of narrow streets and houses. The area of Mary King's Close was originally a number of streets lined with houses, taverns and shops. Buildings were up to seven storeys high and housed hundreds of Edinburgh's inhabitants, but in 1645 the city was hit by the bubonic plague and the confines of the close proved to be a fertile breading ground for the black death.