Lilian ("Lily") Delaney, apprentice to a master bookbinder in Oxford in 1901, chafes at the confines of her life. She is trapped between the oppressiveness of her father’s failing bookshop and still being an apprentice in a man’s profession. But when she’s given a burned book during a visit to a collector, she finds, hidden beneath the binding, a 50-year-old letter speaking of love, fortune and murder. Lily is pulled into the mystery of the young lovers, a story of forbidden love, and discovers there are more books and more hidden pages telling their story. Lilian becomes obsessed with the story but she is not the only one looking for the remaining books and what began as a diverting intrigue quickly becomes a very dangerous pursuit. But with sinister forces closing in, willing to do anything for the books, Lilian’s world begins to fall apart and she must decide if uncovering the truth is worth the risk to her own life.