The Last Unicorn

(I apologize beforehand. I made some names up and if I spell them differently in the story.... sorry) Amon, a boy who's mother died a while back, runs away from home and into a girl named Amalthia. Amalthia saves his life and shows him her true form. She is the last unicorn in our world. She was forced to leave her home under dire circumstances. An attack had been made on the unicorns in her world ultimately killing the remaining unicorns in our world. (explanation later). They embark on a journey to find the last open gate Lerrendeli.