Senku, Taiju and Yuzuriha head to Hakone to collect sulfur for gunpowder, which they’ll need to fight Tsukasa. They accidentally set off an explosion, which attracts some unexpected attention.
A smoke signal...
...إشارة دخانية
Ein Rauchzeichen?
¿Una señal de humo?
Una señal de humo.
De la fumée ?
Segnali di fumo?!
Um sinal de fumaça...
Сигнальный костёр?