Vernon Milbourne, orphaned since childhood and haunted by a recurring dream, is friends with the protective lawyer and MP Sir Edward Leithen. An Aegean cruise takes them to the mysterious island of Plakos, where Vernon is fascinated by the islands myths. Local superstitions turn to menace as Vernons encounter with a beautiful woman results in obsession and adventure. The Dancing Floor centres on a young English woman, Kore Arabin, who inherits a house on a remote Greek island. Sadly for Kore the locals regard her as a witch, responsible for the failure of their crops, and become convinced she must be sacrificed in order to ensure better harvests in the coming years. Sir Edward Leithen and Vernon Milburne must save her before the islanders sacrifice her. Sir Edward Leithen is a character that features prominently in several other John Buchan novels, including The Power-House, The Gap in the Curtain and others.