[Machine Translation] Hiraga, a beautiful genius scientist, and Roberto, an expert in deciphering ancient documents and codes, go to investigate a "miracle" reported by a church in a small Italian village. What they encounter is a mysterious "miracle" in which the church is enveloped in rainbow-colored light as a horn blares. However, the priest of the church seems to be hiding something, and the two become suspicious. Soon, a dead body is found in the church...! What is the mystery hidden in this village where the legend of the "decapitated clown" remains? This is the third volume of the casebook of the genius priest duo.