The story:
The diamond expert Marston and his daughter Robin visit the kingdom of Corba, famed for its vast collection of crown jewels. However, after a swift glance at the gems in the Royal House, Marston pronounces the stones as being clever replicas.

Shortly afterwards Marston disappears mysteriously, and his daughter is caught in no-mans land when her previous whereabouts in the kingdom are airbrushed out of history. Can the Phantom disentangle a massive web of deceit and get to the truth?...