A shy spirit. A scheming queen. And one headstrong princess willing to risk anything for a happily ever after.

Months after her wedding, Elle Blackford is convinced that she and her family have a chance at a happy future, secure in their new life within Ashwood. Even if the threat of war with the summer kingdom of Ravenheart hovers over the land, it feels a long way off in the heart of winter.

But then a mysterious spirit begins to haunt her, one that has refused to move on to the glade of souls. One that won't interact with anyone but Elle. One that makes Elle begin to question the history surrounding the Ashwood family.

Meanwhile, Queen Griselda sets into motion a plan that could destroy Grace's happiness. Furious, Elle fights to help her sister, only to find herself at odds with both the queen...and Prince Fitz himself.

As Elle searches for answers, she begins unraveling secrets that might rip away everything she loves.

*Set after the events of Castle of Dusk and Shadows and Fortress of Blood and Power, this novella features Castle's cast, including Elle, Fitz, and other beloved characters. It can be enjoyed before/without reading Fortress, but may contain some very minor spoilers.*