In a crumbling world abandoned by the gods and ruled by an authoritarian regime, a headstrong young girl named Reese realizes that the folk song her mother used to sing to her actually contains instructions on how to find the Sun Stem, a magical artifact that has the power to save the world. She sets off with her pet rhinoceros, Penelope, and Aubade, a strange and ethereal girl with no memory. Together, they navigate the remnants of lost magic, uncovering the truth about the gods, the war that ended them, and the Sun Stem.