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.
And the key to its success 
is the earrings of science.
.ومفتاح نجاحها هو أقراط العلم
Und unser Schlüssel zum Erfolg
ist dieser Ohrring der Wissenschaft.
La chiave del suo successo
E a chave do sucesso são 
os brincos da ciência.