After more than twenty years of marriage, Chloe Sinclair comes home one night to find that her husband, Nate, is gone. All he has left behind is a cryptic note explaining that he's returned to their childhood town, a place Chloe never wants to see again. While trying to reach Nate, Chloe stumbles upon a notebook tucked inside his antique copy of The Lion, the Witch and the Wardrobe. Written in code, the pages contain long-buried secrets from their past, and clues to why he went home after all these years.