Her name is Jordan Herron. Born on Earth, but raised trillions of years in the past in another universe, she has come to our present to help her family and her race fight the menace from a long-forgotten, ancient time. Together with her Aunt Peyton, the original Quantum Girl, along with Peyton's interdimensional twins, she will risk her life to save the world from an alien invasion. This book marks the conclusion of the Quantum Girl Trilogy.