Thi story is about a young pony named Twilight and her good friend Applejack. They have this theory if they travel to Cobra cave and they dig a hole 15 ft. down that there is a mystery world below , that only they know about!!! Butif one of the two tell another pony something terrible will happen... do you think they will tell? What do you think will happen to them?

Also in this story: rainbow dash and Fluttershy