The water travelers

"The people of Upitar have the ability to go back forth between their world and Earth, through water. Aaron Archien is the heir to the throne of Upitar, and before his father feels he is ready to become king, he is given one last task: go to Earth, find the daughter of Michael Harper, bring her to Upitar, and kill her. The girl, Madalyne Harper, was prophesied about long ago to destroy the waterways, thus ending the world of Upitar. Although against the idea of taking an innocent life, Aaron agrees to do it for the sake of his people. But, upon going to Earth, he unknowingly meets Madalyne and they fall in love before their fates become known"--Page 4 of cover.