Watch on Soap2day. The year is 1949. While digging in ten-thousand-year-old red clay deposits, amateur archaeologist Aizawa discovers stone fragments that he believes to be the relics of ancient humans. But in the postwar construction boom, even red clay is in demand as a building material. Seeking funds for his work, Aizawa travels to a sacred mountain to hunt for the horn of a mythical beast known as "Four Eyes."