Once, Marella belonged to the sea.

She and her family were emissaries, not monsters, swimming the borders between sea and land, keeping peace between the merfolk and the human city of Rossaia. But when the humans turned on them, the mermaids sought salvation from The Stone Witch.

She kept her word, but she also damned them.

Now, Marella and her family exist trapped in stone at the heart of a dried-up city, freed only on the night of the new moon.

And with that freedom comes thirst. To survive, they must drink human blood before dawn seals them back into statues.

Garrett is living an unmoored life.

Looking for something to anchor him, he arrives in Rossaia haunted by emptiness. There, he joins the Fratelli di Sangue, an ancient brotherhood sworn to cleanse the city of the monsters haunting its streets.

Monsters like Marella.

When a chance encounter turns into a dangerous rescue on a moonless night, both hunter and hunted find their certainties unraveling. Drawn together by blood, secrets, and a forbidden pull neither can deny, they stand on opposite sides of a war older than memory, and to choose each other may mean betraying everything they believe in.