The Fifth Realm

The main character, Luna finds a key that leads to another realm. As she travels through the realm she meets many new people. As she meets the other main character, Fern. They travel together on their journey through the Five Realms, Kaira-the forest realm, Pelagic-the water realm, Nefelibata-the sky realm, Asterin-the star realm, and Aurelia- the golden realm. As Luna travels, what kind of things will happen? What kind of people will she meet on her adventure?