The Daughters of Nefertari is a secret organization descended from the bloodline of Nefertari.
The women are tasked with seeking out the Lost Queen and reuniting her with her beloved husband, Ramses II. Unfortunately, most of the Daughters die searching in the desert. Well-aware of this possibility, they write letters describing their duty to their daughters, sometimes before they're even born. As a young girl, Jamila El-Dine received such a letter from her mother after her death.
Strangely, the Daughters of Nefertari appear to have installed a suspiciously modern wrought-iron gate guarding the second exit of Nefertari's tomb which Jamila has the key to, implying that they already knew where she was buried. As this negates their entire reason for being, this is quite puzzling.