Gintoki and the others were tossed into the ocean on their way to Ryugu Palace and are now stranded on an unknown deserted island. They search the island for any resources to help survive and are reunited with Kamenashi. Amazingly, the island was Ryugu Palace. Meanwhile, giant turtle robots have appeared in Edo and Gintoki and the others hear about it on the news on TV. According to Kamenashi, Otohime, the owner of Ryugu Palace is carrying out a devious plan.
Don't tell me you touched the sample
¿Acaso tocaron el ejemplar del Cofre G
 que robé del Palacio Ryugu?
Não diga que vocês tocaram o 
modelo de Caixa de Tesouro G