Innkeeper’s daughters Adele and Eleda are "mirror twins"—identical twins whose looks are reflections of each other’s—and their special talents are like mirrors, too. Adele is a Safe-Keeper, entrusted with hearing and never revealing others’ secrets; Eleda is a Truth-Teller, who cannot tell a lie when asked a direct question. The residents of Merendon often turn to the twins—especially their best friend Roelynn Karro, whose strict, wealthy father is determined to marry her off to the prince. When the twins and Roelynn are seventeen, a handsome dancing-master and his apprentice come to stay at the inn, and thus begins a chain of romance, mistaken identity, and some very surprising truths and falsehoods.