Sara is a Guardian, an elite human warrior trained to battle the races of Rhea, but she soon finds herself on a quest to save them when their afterlife is invaded by a powerful, mysterious race called the Pelasgians. In the journey that follows, she will see a side of the Rheans never before seen, and discover that the Pelasgians are a much greater threat than anyone can imagine.

Continuing from The Guardians of Rhea, the Rheans return to their homes only to find out that the Pelasgians now threaten to strike at every city in Rhea. Unable to unite their forces, the Rheans are forced into a desperate struggle for survival. Meanwhile, Sara will comes face-to-face with Nibiru. As she learns more about the Pelasgian, she will uncover a horrible secret Leon has been hiding.