Ceasarea

Melissa Huthel's landmark voyage to inner Venus was met with tragedy when her Sun Cruiser mysteriously powered down, went off course, and disappeared. Years later, as her younger sister Leslie is on the brink of graduation from the Galexerium, she learns that the missing craft has never stopped transmitting distress calls. Unbeknownst to the general public, a secret and ongoing investigation into the failed mission revealed a mass deep in the planet of Venus, and Leslie quickly accepts an assignment to travel there and salvage what everyone believes are the remains of the Cruiser – and her sister.

But it's more than just a mass. 

A small trio of sister worlds thrives in the heart of Venus and Melissa, who survived the journey, has been adopted into the royal family. Scared and alienated by her ambitious adopted sister Tachoma, who has unstoppable designs on the crown, Melissa is just trying desperately to survive and return to Earth. Tachoma has other plans. She has no intention of releasing Melissa and every intention of conquering the two neighboring worlds so she will have the army and the resources she needs to invade Earth.

Melissa learns, to her horror, that her adopted family and new circle of friends know all about Earth – because that is where these three distinct species came from. Banished and forgotten by the human race, two of the species are content to live out their days in peace in their new home, but Tachoma's restlessness and drive for vengeance threatens them all.

For Tachoma, Earth is not without its challenges, but the cunning princess has a plan. Her eyes and ears on Earth is someone - or rather something - nobody suspects. An intergalactic war is looming, and Leslie is about to fly right into the heart of the storm, bringing all of humanity with her.