Dr. Stone › Saison 1 Dr. Stone : Stone World

Chapter 9 — Episode 9

**Beginning:** The episode opens with Senku using ramen made from foxtail millet to attract villagers, planning to recruit manpower for iron-making through the appeal of food. Gen Asagiri, a mentalist from the old world, is caught eating the ramen without permission, and Kohaku confronts him at knifepoint, suspecting he is a spy for Tsukasa. Gen reveals he has been alone since being de-petrified, and Senku recognizes him as a psychology book author and magician, keeping him at arm's length. **Middle:** Senku announces his goal of building a power plant, which shocks everyone, and reveals he needs a powerful magnet first. When a sudden thunderstorm arrives unexpectedly, Senku decides to use lightning to magnetize an iron rod rather than wait for prepared lightning rods. Working at frantic speed, the group melts copper, carves grooves into bridge planks to cast copper wire, and coats the iron rod with lacquer as insulation — all while Magma and his allies threaten them, believing the outsiders summoned the storm with sorcery. Lightning strikes the iron rod successfully, creating a powerful electromagnet. **End:** Using the magnet, Senku builds a hand-cranked dual-disc generator, and recruits Kinro and Ginro to operate it by appealing to their synchronized strength and hinting that electricity could repair their golden spear. With the generator running, Senku reveals a filament made from charred bamboo fiber and, climbing to a high point, lights up an incandescent bulb — Edison's light bulb — illuminating the night for the first time in 3,700 years, declaring that science has once again conquered darkness.