Halley finds herself thrown back in time to 21st century Australia, where her only hope of returning home is to await first contact with the enigmatic aliens who have discovered time travel. Picking up where Time Future--the first book in the series--left off, Halley finds herself thrown back in time to 21st-century Australia, where her only hope of returning home is to await first contact with the enigmatic aliens who have discovered time travel. Meanwhile, back in her "home time," a universe of warring alien species finds itself at a flashpoint, fighting over control of the time travel technology.