In the beginning, the universe existed as one, where humans and their gods lived among each other and existed within the same realm. Due to an ancient war, dubbed " The War in Heaven", circumstances forced the universe to separate, creating 2 dimensions. This was done to prevent the universe from being utterly destroyed, and led to the creation of two planes of existence: The mortal realm in which humans inhabit, and the Aether, where the gods reside. However, the separation of the realms was not perfect. Due to shoddy work by the gods or some ancient attack, certain energies of the original universe became trapped between the two planes, creating an "in-between" realm that exists between both dimensions. These energies became corrupted, creating strange creatures called the fey.

The fey realm exists as an open door to both planes, allowing them to travel freely between them. The fey themselves prey on the mortal races for sustenance. They invade the mortal realm in small invasions called " Wild Hunts" with the intent to kidnap humans to bring back to their slave pens for torture. The agony of the slaves feeds the fey and sustains them until the next invasion. The mortal realm is very advanced and are capable of fighting off the fey. Therefore, the fey must operate on a culture of piracy, hitting when least expected or after a tragedy, such as a natural disaster or a war.

The fey can travel to and from the mortal realm through their doorway plane. However, even though the humans are more advanced technologically, they are unable to pass into this realm. This is despite knowing where it is and how to find it. How could this be made possible?