After a successful test of their new cell phone, Senku learns of a mysterious tale about a bee named Speaker who can play the voices of the dead.

While Senku's diversion buys Gen and others some time, soon Homura realizes something is not right.

Taiju and Yuzuriha are on the verge of tears after they hear Senku's voice, and Senku informs them of his plan to win the war without any bloodshed.

The final touches to the automobile are made and it is used to transport the science supplies to a fortified cliffside that's close to the Tsukasa empire. From there the automobile is upgraded into a tank, but unbeknownst to the rescue group preparations by the empire have been made to counter any vehicular attack.

The Final Battle for the miracle cave starts as Senku and the Kingdom of Science conduct a frontal assault on the cave.

Senku demands a truce from Tsukasa in return for reviving his sister, Mirai, who Tsukasa comes to know is alive, but a new problem shows up when Hyoga shows his true self.

The Kingdom of Science is victorious, however it is not over for Senku. Senku must use all of his knowledge to cure Tsukasa who is severly injured.

The battle against Tsukasa's empire is over, and Senku and his team set out to save Tsukasa, who is in cold sleep. To discover the mystery of the petrification phenomenon, the Kingdom of Science finally set out for the New World on the other side of the Earth! Senku and his team begin to build a ship for the voyage. In an attempt to recruit a godly captain with 10 billion navigational skills, they awaken Nanami Ryuusui, the heir to the Nanami Conglomerate and an expert sailor, based on information from Minami, who used to work as a journalist. With his overwhelming greed, Ryuusui creates a currency in the village and enjoys a luxurious life. In exchange for captaining the ship, he proposes he wants the king of all resources, "oil."

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.

Amaryllis explains how she evaded petrification and how she came to her decision to sneak into the inner palace.

Kohaku has located the treasure left behind by Byakuya and the others, but it's encased in concrete. Senku has to devise a plan to quietly get at the contents inside, so as to not alert the guards.

With the petrification device in the Kingdom's hands, it's time to revive Tsukasa. But there's just one problem: the device is out of batteries.