Luna Graves doesn't believe in monsters. Too bad they believe in her.

Luna is a tattoo artist who specializes in dark and foreboding designs. The creatures are a product of her imagination...or are they?

When her estranged father dies, Luna must re-evaluate everything she thinks she knows about the world. It's her destiny, she learns, to be a doctor to monsters.

Caught between the demands of her human life and her new calling, Luna must learn about a secret world that hides in plain sight. With an ancient evil returning whose goal is to release the Black Death, Luna is the front line of defense for both non-humanity and humanity alike. Will she be able to cure the disease before it destroys Los Angeles and then the world?