Four teenagers, a strange pendant, and a world never seen by human eye. When Zach, Cloe, Andrew, and Joe discover an old pendant, they're sent away to a distant world named Adven. Upon their arrival, the four are instantly enslaved and thrown into a fighting arena, where they are pitted against other strange and extraordinary captives. The people of Adven possess a unique ability, known as kahn. The captives have to use their kahn to help themselves emerge victorious in their battles; if not, they won't live to see another day. While Andrew, Joe, Zach, and Cloe are in this world, their kahns slowly awaken inside of them. They constantly struggle for survival with their newfound abilities, trying to defeat giants, immortals, and shape shifters. Luckily, they are not alone! A wise old man they nickname Gramps is forced into the arena with them. He teaches them the basics on how to use their kahn and gradually increase their skills. Will they learn how to perfect their kahn in battle - and will they survive long enough to find a way home?