After the harrowing events at Mill House, Zoey, Len, and Poulton are irrevocably changed. Poulton is haunted by his demonic possession and Zoey is paralysed with no hope of recovery. That is, unless Len can find the mother whom she brutally banished more than a hundred years ago.

Finding Roan will be no small feat. First Len will need to face a past locked out of her memory and travel the darkest paths of the Conjure.

To keep her away from danger, Len must leave Zoey in the last place she wants to: the convent where Len spent her childhood, a century and a half earlier. But the Sisterhood of the Sparrows may not be the haven Len assumed, and when the Beast comes whispering, the embittered Zoey may be too susceptible to temptation.