Senku and friends begin handing out ramen in the hopes that the villagers will join the Kingdom of Science and help them create the antibiotic and make other advances in society using science. They need manpower to do this per the last episode, Stone Road.
An outsider with a cool haircut that rivals Senku’s (I haven’t decided who’s hair is better) arrives and starts eating a bowl of ramen. Kohaku calls him an enemy holds him at knifepoint along with Ginro and Kinro.
Turns out this man was a famous magician pre-petrification and considers himself a mentalist. Kohaku thinks he’s full of crap and he seems shifty. However, Senku opts not to debate whether he is good or bad but makes him work for his meal.
Let There Be the Light of Science
This new character is named Asagiri Gen. He and others from the village join the group for manual labor. Doing so allows the group to acquire iron. Senku asks Asagiri how Taiju and Yuzuriha are doing. Asagiri admits that he is a spy for Shishio and that his job is to confirm Senku’s death.
Asagiri says that regardless of which side wins (Science or Shishio) he’s going to go with what makes him the happiest. That turns out to be girls and food, but mostly girls. Kohaku is disgusted and threatens to kill him or imprison him.
Senku holds her off by telling her that Asagiri needs to report back to Shishio to avoid him coming to investigate for himself. He then promises that once Asagiri sees the advances they make he’ll want to join the Kingdom of Science.
The Kingdom of Science is working on creating a generator. Senku states that they’ll need lightening and as luck would have it a thunderstorm lights up the sky. Senku looks shaken to the core because he was ill-prepared for the storm.
The team springs into action to create lightning rods to harness the energy of the lightning and create a magnet. Some of the primitive villagers mistake this frantic preparation for the destruction of the bridge and anger of the heavens due to their sorcery. Asagiri uses a flower trick to confuse the primitive group so that the Kingdom of Science can continue with its mission to harness the lightning.
Chrome, Senku, Kohoku, Ginro, Kinro, and Asagiri all stand on a hill with iron rods waiting to get struck by lightning. Kohaku uses Kinro’s spear with the golden tip to mount the iron rod in the air. As a result, a magnet is created to aide the group in the creation of the generator.
They create the generator and with some Asagiri’s magical persuasion, Kinro and Ginro finally join the Kingdom of Science as the two operators of the generator with promises of getting new golden spears.
Senku also created a light bulb that illuminates the night, showed the group the result of their hard work, won over Asagiri, and took Senku one step closer to realizing his dream of bringing the world back to its former glory.