Tsukasa has learned about the cave where the nitric acid is collected. The race is on between Senku and Tsukasa to restore humanity in their respective visions.
Something happened while 
I was gone, didn't it?
.لا بدّ أنّ شيئًا ما حدث في غيابي
Während ich weg war, ist was vorgefallen.
Algo debió pasar mientras no estaba.
Algo debió pasar mientras no estaba.
Il s’est passé un truc
quand j’étais pas là ?
È successo qualcosa, vero?
Uma coisa deve ter acontecido 
enquanto eu estava fora.
Пока меня не было,
что-то произошло, да?