Kohaku has located the treasure left behind by Byakuya and the others, but it's encased in concrete. Senku has to devise a plan to quietly get at the contents inside, so as to not alert the guards.
Humanity's already dug up all 
the precious materials that
استخرجت البشرية كلّ المواد الثمينة
Denn die Menschen haben die seltenen
Ressourcen, an die man leicht rankommt,
Porque los recursos más raros
cercanos a la superficie
Porque los recursos más raros
cercanos a la superficie
Les ressources rares
facilement accessibles
Perché le poche risorse che si trovano 
nei punti più accessibili della Terra,
A humanidade já cavou todos 
os minerais preciosos que
Ценные ресурсы в легкодоступных
местах Земли