The Doctor and Peri visit the planet Targos Delta to check in on old friend Professor Albrecht Thompson, only to discover that he has vanished. The Doctor’s curiosity is piqued. They must investigate, but they must do so stealthily… Peri will go undercover on Paradise 5, while the Doctor hides in the shadows. Because paradise holds a terrible secret beneath the white marble and golden trimmings. And the Elohim are coming.