In a world transformed by ETHERNA—a device that enables communication with the dead through their most cherished possessions—the Ethernel team tracks down and interrogates victims' "transitional objects" to solve crimes. David Novack, a detective haunted by his wife's unsolved murder, discovers during an investigation that her killer is still alive. While pursuing this new lead, his path crosses with that of Lara di Angeli, a mysterious Italian police officer who is herself searching for a priceless transitional object. Thus begins a hunt where every object unlocks a memory and every death reveals a truth; they are forced to confront their pasts and lay bare their deepest secrets.

England, 19th century. 12-year-old Mary is passionate about the fossils that she collects and sells with her father. When he accidentally dies near the fossil cliffs, Mary, her brother and her mother struggle to make the payments for the family house, meaning they will probably have to leave the seaside that Maëlys loves so much. But her father left a mysterious message: what was it that he saw on the cliffs before he died? With some help from her friends, Mary will fight to save her home and continue to do what she loves, searching for fossils, in the midst of a society where girls should not ​“behave like men”. Mary doesn’t know it yet, but she’s going to go down in history…