The Librarium floats high above Selden, containing the universe's most powerful knowledge. The Sanctium is hidden above the Burning Ocean, within it, the darkest knowledge of the universe. Protecting them are Domus and Froy, the guardians. As a threat arises and makes itself known, Domus is cast out of the Librarium. Unknown to him, he begins a journey to unite with Froy and seek victory over an even greater enemy than anticipated.