Barcelona, 1957. Daniel Sempere runs a bookshop, is happily married and has a son. No longer the child who discovered the Cemetery of Forgotten Books, he is still haunted by the mysterious death of his mother when he was six years old. One morning, a mysterious figure enters and buys a precious copy of The Count of Monte Cristo and inscribes the book with the words 'To Fermin Romero de Torres, who came back from the dead and who holds the key to the future'. The fourth book in the Cemetery of Forgotten Books series.