The story centers on , a 12-year-old girl who is perceived by others as unusual. Kia has a passion for collecting porcelain animal figurines and spends her time exploring mysterious locations like the Moon Garden and the abandoned Orpheus Theater with her best friend, Simona.

Naslovno „dvanaesto more“ simbolizira ultimativno mjesto slobode, neotkriveni prostor u ljudskoj duši gdje plove sve naše neizrečene želje, snovi i maštarije. Zašto je „Dvanaesto more“ obvezna lektira?