When Lady Baskerville's husband Sir Henry dies after discovering what may have been an undisturbed royal tomb in Luxor, she appeals to eminent archaeologist Radcliffe Emerson and his wife Amelia to take over the excavation. Amid rumours of a curse haunting all those involved with the dig, the intrepid couple proceeds to Egypt, where they begin to suspect that Sir Henry did not die a natural death, and they are confident that the accidents that plague the dig are caused by a sinister human element, not a pharoah's curse.