Hyoga is disarmed, but the kingdom of science is still in danger - Ishigami village is in flames. And Tsukasa will soon know that Senku is still alive - How will the villagers fight off the coming invasion?

With Chrome and Kaseki's water wheel finished, Ishigami Village moves into the age of electricity! But with the primitive materials available to him, will Senku be able to create a filament that can withstand the intense heat of operating a vacuum tube?