In early 15th-century Poland, twelve-year-old prodigy Rafal adheres strictly to reason, aiming to gain societal approval and avoid emotional interference. He publicly announces his plan to study theology, the most respected academic field of the time. However, an encounter with a mysterious figure drastically alters Rafal's life path, igniting a passion for astronomy.
Rafal is determined to prove the heliocentric theory—the idea that the Earth orbits the Sun—is both beautiful and logical. Yet, in the eyes of the powerful Church, this view is considered heresy, as the Church enforces geocentrism, insisting that the Sun revolves around the Earth as the sole truth of the universe. Anyone who contradicts Church doctrine faces extremely brutal punishment.
While gathering evidence to support heliocentrism, Rafal must not only solve problems of precise measurement and constructing empirical models but also conduct this research in secret to avoid meeting the same fate as other heretics.