In the underground halls of a dystopian textile factory, the rhythm of machines dictates the lives of Alba and Samy. Every day, they pull endless lengths of fabric through the deep blue of dye that has already become permanent on their skin. During their shift, Alba tells the story of the girl who lived at the bottom of the ocean. Samy immerses herself further and further into the narrative of the character Nanami who wants to free herself from enslavement by the rulers of the ocean.