19th century, Ireland.

Maggie Connell has been able to create a new life for herself on the Atlantic Way despite her feral upbringing with the Fomorians. But for Maggie, life is always good until it's not. To her distress, Maggie's lover, Cuan, seems to be aging on without her, and her own flesh is transforming into the creature against her will at the worst possible moments. Frightened that she is losing control of the serpent's blood within her, she seeks out the fae to undo her curse. For if she is lost to the creature, she will robbed of everything, including Cuan and her family. But will the mysterious fae aid her? Or something even darker?

This is a dark echtra of Irish gods, a vengeful witch and fae creatures. The path is dangerous, but leaving the path is deadlier.