In this retelling of "The Worn-Out Dancing Shoes," Agatha Christie meets the Brothers Grimm when young detective Daniel Carmichael and his wife Lorelei investigate the mysterious circumstances surrounding a college for young ladies. Everyone knows that a handful of the students have been disappearing each night to go dancing, but nobody knows where the students are going or how they're getting there without leaving their room. Daniel Carmichael takes on the case, determined to prove on his first case that extensive experience does not a good detective make. When his wife Lorelei decides to join the investigation by going undercover as a student, the two are swept into a complicated puzzle full of dancing, secret notes, enchanted music, and a considerable dose of dark magic. The Carmichaels soon discover the dangerous nature of their investigation. But will they solve the mystery before they too are locked in a powerful spell?