Humanity managed to advance to the point of opening up portals that led to other worlds and dimensions. From those dimensions emerged terrifying monsters that wreaked havoc on the world. The portals were closed eventually, but not before a humanoid species known as the Primis managed to take control of the world.

The Primis are a godly race that live forever. Once every ten years, they hold a Great Tournament that will yield a single winner. The prize for the winner? The opportunity to became a Primis.

Celestria is a princess from a small kingdom in the corner of the new world. She is determined to win the Great Tournament and be a Primis so that she can destroy them from within.

Noah hates the Primis and all that they stand for. He bumps into Celestria when she sneaks up on him, knocks him unconscious and steals his food. Aside from that, Celestria seems likeable to Noah, so he decides to help her win the Great Tournament.

As they travel to Primis, where the Great Tournament is being held, the world around them begins to descend into chaos as the monsters of old begin to reappear.