When World War 2 pilots captured images of strange markings in the English country side, no one knew quite what they meant. Who made them, when and why? For journalist Andrew Gough, the truth lay in an Elizabethan code hidden for centuries. Follow him as he uncovers a story of religious persecution, witchcraft and espionage. Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena.