The fourth season of Dr. Stone.

Having successfully reinvented the phone, Senku contacts Taiju and Yuzuriha, setting his plan in motion to win over Tsukasa's allies. But in a kingdom where might makes right, not everyone…

When the infected approached Rei and Takashi's school, it led to a gruesome blood bath that left the majority of students and staff dead or turned into the zombie-like monsters…