Dr. Charlotte Ashford has devoted her career to separating the real Thomas Learmonth from the legend of Thomas the Rhymer. According to folklore, the thirteenth-century Scotsman followed the Queen of Elfland beneath Eildon Hill, vanished for seven years, and returned unable to speak a lie. Then Charlotte meets him. Thomas is still alive, still unable to lie, and surrounded by an immortal family whose existence has remained hidden for centuries. He was also a vampire before he entered Elfland, which means the familiar legend preserved only part of the truth. When Charlotte uncovers a mysterious manuscript connected to Thomas’s past, she finds evidence of a missing seventh line. Someone is willing to kill to possess it, and the secretive Vigilia Noctis has begun watching Charlotte as closely as it watches the Learmonths. Caught between history and a supernatural world she never believed existed, Charlotte must uncover what the manuscript once contained before its missing words place the entire Learmonth family in danger.