Four years passed since the battle of the Prison of Light. The men of the dark lands endure meagre existence, while others in their protected utopia prosper. When Dr. Mary Wilson and the Prince of Shadows start having the same terrible nightmares, the Goddess Neith labours to discover their meaning. But her actions unwittingly release an ancient protector, one she may not be powerful enough to defeat alone. Mary must rely on her skill as an archaeologist, as both sides work together to discover the location of the hidden Tomb of Horus. Within, they must unlock the secret Songs of the Osirian, and convince the Jackal