Chise shares a meal with her new classmates, but several teachers and students at the College have their eyes on both her and Elias for reasons yet unknown. Chise and Elias head home for the weekend and Stella drops by for a visit.

Chise learns a bit more about the history of both the College and her classmates. Zoe's secret is revealed, and a pact is formed.

While continuing to use the hot air balloon to search for the oil, it's decided that Ishigami Village needs to take up agriculture to prevent future food shortages, as well as to produce preserved food for their upcoming sea voyage.

Senku, brings along a team to look for the Sagara Oil Fields. Meanwhile, Suika and Francois go truffle hunting.

The morse code signal reading "WHY" saturates the airwaves too much for Ukyo to pinpoint a direction, so the Kingdom of Science works on a way to visualize the signal.

The morse code signal reading "WHY" saturates the airwaves too much for Ukyo to pinpoint a direction, so the Kingdom of Science works on a way to visualize the signal.

Kaseki's efforts to build the science vessel Perseus hit a roadblock when he realizes that it's impossible to get all the parts to fit in practice.

As Touka and his friends pursue the entity enslaving the townspeople, an encounter with another adventurers' party raises new questions.

The Perseus arrives at the treasure island. A recon squad consisting of Senku, Soyuz, Kohaku, and Gen set off to locate the platinum and make contact with the islanders. Ukyo later discovers something on the seafloor and send Ginro to investigate.

The café is busier than ever as the Blume election approaches. Fearful that her true feelings for Hime have been discovered, Kanoko becomes suspicious of Sumika's motivations.

Lindel finishes the staff that Chise had finished carving. As she finishes, she meets an old friend, who offers her some wise advice.

The only way to save the crew of the Glomar from the Chiram is Kei’s death.

Someone must act as a decoy. But with the Chiram out in force, there’s a good chance the volunteer won’t be coming back…