Eight months ago, during the depths of a snowy winter, Alaric and Naia Underwood switched realities. Then in June, as floodwaters surrounded their two versions of the house called Withern Rise, they met again, and tragedy struck.

It's autumn now, and Naia is feeling haunted. She's seeing things that shouldn't be there, and an unseen hand draws her into a tangled forest, where she meets an Alaric who lives like a savage. Here, in this dying reality, are the answers to so many questions-if she can only reach the man who calls himself Aldous U.

Life-changing resolutions are in the air in the worlds of the Underwood See.