Noble sisters Sasha and Adrianne, along with their faithful companions—a satellite and a tiger—have defeated Tartarus, freeing the subterranean city of Mu from a dangerous tyrant. In gratitude, the council gifts them a powerful nuclear machine. Their mission is to journey to the surface with the machine and jump-start civilization. However, Tartarus, hiding like a snake in the grass, soon gains possession of the nuclear machine.

During his escape from the intra-earth, Tartarus disrupts Mu's spinning magnetic power source, causing explosive bursts of energy to erupt onto the surface. This disruption tears the fabric of time and creates a doorway into a parallel reality. In this new reality, Tartarus reinstates the nuclear machine and positions himself as Earth's savior in place of the sisters. With unlimited power and resources at his disposal, will Sasha and Adrianne ever be able to stop him?

In The Aswan Device by Kara Jacobson, we experience a fast-paced fantasy adventure where love and friendship prove to be the strongest weapons of all.