Tsukasa's army is coming! Kinro struggles to hold the bridge against the deadly spearman Hyoga and his shock troops, but Senku and the villagers are ready with deadly new weapons of science!

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?