The life and prophecies of Mother Shipton, a famous English prophet from the 14th century. She was known for her predictions about modern technology, transportation, historical events, and even the end of the world. One of her most famous prophecies is about a comet or asteroid hitting the Earth, causing massive disasters and wars. Despite the disasters, mankind stores up secret food supplies and underground bases. The episode also reveals the mystery behind the petrifying well near Mother Shipton's dwelling, which turns objects into stone.