After returning from an 18-month assignment with the Department of Mysteries, Hermione discovers that her old life in England has changed. Her motley of friends has expanded, and even Draco Malfoy is accepted. And to her profound dismay, the Unspeakable realises that she may need to accept her old bully as well, because the Ministry has assigned Auror Malfoy to her next case—a time-travelling quest to find the lost cure for memory ailments. As the unlikely pair embark on their task, they unravel mysteries and face historical fiends they never expected. And as Hermione grows fonder of the man she never wanted to forgive, she discovers the secret that he’s kept locked away…a secret that makes their task all the more consequential. But can time heal all wounds, or will it break an already damaged heart?