Where Two Million Years Have Gone

Senku teams up with Kohaku to restore hot water to her village in order to help save her seriously ill sister. During their journey, Kohaku reveals the existence of a hidden village made up of forty people, descendants of humanity who survived the stone world. However, Senku is forbidden from entering the village as an outsider. Later, Senku meets Chrome and introduces him to the true history of mankind, explaining the scientific progress achieved over millions of years and igniting a spark of curiosity that could change the village forever.