A young woman knocks at the door of your PI agency. “My name is Gladys Ungerton. My friend, Ned Malone, has gone missing. You probably heard about him: he is one of the members of Prof. Challenger’s expedition! They recently returned from the Lost Valley full of strange creatures. I just received this notebook and this odd message. I don’t understand a word of any of it. Can you please go to the offices of Prof. Challenger? If you are true to your reputation, you will bring Ned back to me!”