Sally O'Connor has no idea what's happened to her: one moment, she was helping out with the berry harvest at the farm, and the next, she's in a world of talking magical horses. All she wants is to go back home, but she soon finds herself being asked to help track down another Avatar, a human in a pony body like her, to help ensure that no more unwitting victims are pulled into this strange fantasy world.
But in a world where many humans have taken on forms and powers they've always dreamed of, she'll soon learn that even in a colorful world of happy horses, danger can lurk around every corner. Her only hope for survival will rest in the friends she'll make... and by helping a long-banished Avatar remember that everyone deserves a second chance.