The Sword of Destiny (Spirit Sword Saga)

Three teenagers, Drage, Matthew, and Aria, live in Paradise Shores, a quiet little suburb outside Boston.While Matthew and Aria are planning for the future, Drage yearns for an adventure, a way out of the mundane expectations of his single mother. One dark night, he gets more than he bargained for when wispy Shadows come to threaten their lives. The three are whisked away to an underwater world of magic and technology. As the teenagers race to return home before all war breaks out, they realize there may be more mysteries in the golden kingdom in the sea than they could have ever imagined.