Eight centuries after Thomas Learmonth escaped the creature that made him, a newly discovered medieval manuscript depicts horrors he believed existed only in his broken memories. The search for answers reunites Thomas with Charlotte Ashford, who has spent seven weeks trying to leave the supernatural world behind. Together with Alexander, they follow an ancient mark from a London auction house to the guarded collection of a powerful Welsh vampire. What they uncover could overturn everything the vampire houses believe about their origins, and expose secrets Thomas has kept even from his own family. As old memories surface, the surviving members of the Mysterious Noctilus Vigil emerge from hiding. Thomas must protect his children while confronting the buried history of his making and the growing possibility that its consequences did not end with him. Some histories are buried because they were forgotten. Others were meant to stay hidden.