Many years ago, people's lives were in grave danger. A war between the human race and the immortals has been raging on for hundreds of years. However, little did the immortals know, it was close to an end.
The humans, discovering the weakness of the immortals, have been building a weapon of mass destruction. When the time was right, they used this weapon and killed off over half of the immortal race, making the immortals back out of the war and hide for their own safety.
Now, immortals have built their own sanctuary, far away and out of reach of the mortal race. Putting the horrible memories of the war behind them.