Amaryllis, Ginro and Kohaku are chosen to join the inner palace. The science team will need a way to communicate with them in secret, and, eventually, a way for them with the science team.
The ultimate treasure chest, left behind 
by Senku's father and his team...
...صندوق الكنز المطلق الذي تركه والد سينكو وفريقه
Das ist sie.
Tiene que ser…
Tiene que ser…
C’est…
Ecco di cosa si tratta.
O baú do tesouro supremo, deixado pelo 
pai do Senku e seus companheiros...
Это…