Hydrophilous Brood takes place in Pamugara, a dimensional nest immersed in a lush world where organisms are rematerialized into new hybrid species after passing through a powerful portal, a highly unpredictable artifact known as the 'Mossbane Lantern'. Each song has a thematic connection to various artifacts on the previous album (Mossbane Lantern), extrapolating the characteristics and aftereffects of those artifacts within this temperamental environment of a planet.