In the candle-lit depths of the Halosin Archives, the enigmatic Caelum searches endlessly for answers. Haunted by a cryptic past, the young man is driven by a single question: Who are we? His sleep is disturbed by visions of another’s life. From these dreams, he has drawn forgotten Umbral magic without a mentor’s guidance, heightening his anxiety. Hoping the key to his past can be found within the world itself, he embarks on a journey to uncover the unknown and piece together the mystery of his and his sister’s identities.