In the revered Vatican City, an organization known as the "Assembly of Saints" diligently examines alleged miracles worldwide to validate their authenticity. Within this group are miracle investigators, including Robert Nicholas, a seasoned expert in archives and cryptanalysis, and his close companion Hiraga Josef Kou, a brilliant scientist. As partners and friends, they delve into these supposed miracles, unraveling the hidden truths and intricate plots concealed within.