Lumen, a small luminous Animus, wakes up in a dark, rocky cave full of ancient symbols and magical elements. One day, the cave collapses, and Lumen strives to get out with the only help of a group of fireflies. On the surface, Lumen discovers an immense, desertic universe inhabited by other luminous beings. From then on, Lumen starts a long journey to understand not only its life’s origin but also its destiny.