Tina Mains isn't an average teenager--she's also the keeper of an interplanetary rescue beacon. One day soon it is going to activate, and then her dreams of saving all the worlds and adventuring among the stars will finally be possible. Tina is the hidden clone of a famed alien hero, left on Earth disguised as a human to give the universe another chance to defeat a terrible evil. When the beacon activates, Tina's destiny isn't quite what she expected. Things are far more dangerous than she ever assumed. Luckily, Tina is surrounded by a crew she can trust, and her best friend Rachel, and she is still determined to save all the worlds. But first she'll have to save herself. -- Adapted from jacket.