Anna is a humanoid mermaid who spends her days with the local timekeeper until a podmate comes to her with a proposal. They hatch a plan to head out into the watery ruins of humanity in search of lost technology and materials. For a young mermaid living in the dredges of society, the promise of riches from such a find is just too big to pass up.

When humanity has been driven into the sea, what lurks above the waves?

Armed with nothing more than an old map and some rusty road signs to follow, they are soon reminded that adventure often brings forth more than its fair share of rough waters. Her friend gets captured, leaving Anna alone in a world where mermaids are nowhere near the top of the food chain.

Follow Anna as she makes landfall and learns why her ancestors abandoned the surface. Lost in a world that is perpetually covered in a thick fog, Anna must navigate through what remains above the high-water mark. What will she find? An ally? A foe? Or will she find nothing more than death and destruction?