A high school swimmer, intent on being scouted and awarded a scholarship, tries to deal with the pressure of it all while feeling a strange, dark suspicion that she is actually a mermaid.

"Once there was a mermaid called Amelia who could never be content in the sea, a mermaid who longed to know all the world and all its wonders, and so she came to live on land. Once there was a man called P. T. Barnum, a man who longed to make his fortune by selling the wondrous and miraculous, and there is nothing more miraculous than a real mermaid. Amelia agrees to play the mermaid for Barnum and walk among men in their world, believing she can...

"Orphaned as a young child, Mirin O'Malley has been brought up by her grandparents on their isolated, rambling estate Hob's Hallow. Long ago her family prospered due to a deal struck with the mer, the terrifying creatures who live in the depths of the sea: safety for their merchant ships in return for a child of each generation. But for many years the family have been unable to keep their side of the bargain and their fortunes have suffered as a result....

"You may think you know how the fairytale goes: a mermaid comes to shore and weds the prince. But what the fables forget is that mermaids have teeth. And now, her daughters have devoured the kingdom and burned it to ashes. On the run, the mermaid is joined by a mysterious plague doctor with a darkness of their own. Deep in the eerie, snow-crusted forest, the pair stumble upon a village of ageless children who thirst for blood, and the three "saints"...