Cleo lives in a world not unlike our own 100 years into the future. Everything is peaceful and normal, with the exception of a period of 25 years that no one speaks of. It's called the Time of the Tombs, and Cleo's own Great Grandma Quinn was born at the very beginning of it. To everyone's surprise, when Grandma Quinn passes away, she leaves her voice recordings from the Time of the Tombs to Cleo along with an ominous warning. The recordings tell every detail about The Time of the Tombs, from the rise of the terrorist group called The Pharaohs, to the destruction of the world as we know it, to the rebellion that brought down self-named King Tut. However, a new group of pharaohs is building, and Cleo must use her new knowledge of the past to stop them before the world is mummified once again.