Two figures in white robes converse urgently in a dim, precisely-cut stone chamber illuminated by a single torch, with two black sarcophagi in the background.

The Seal of Silence

Archaeologists excavating the Taposiris Magna tunnel have found it partially collapsed and blocked.  The conventional explanation is earthquake damage.  But what if some of that collapse was not an act of nature,  but an act of will?  A deliberate, desperate act to hide a secret so great that those who knew it had to bury themselves along with it?