Jomon Period. This word that even elementary school students know if they are Japanese. However, the more I know the actual situation, the more mysteries there are ... In fact, most of them are mysteries. Although there are a huge number of strange shaped objects such as clay figurines that seem to support the theory of aliens flying to Earth, what they are, even now in the 21st century. It's still a mystery without anyone reaching the truth. The film approaches the core of its secrets through interviews with archaeologists, cultural figures, artists, and those who are passionate about the Jomon period.