Saving the world isn't easy, but it's the task given to Guren, Ceylan, Chooki and Toxsa after accidentally stumbling through an interdimensional portal. After traveling through space and time, the quartet arrives on the other side -- as Bravenwolf, Tributon, Lydendor and Valom, collectively known as the Tenkai Knights -- in the world of Quarton. The reluctant heroes hold the fates of two worlds, for they must stop evil Vilius and his army of shape-shifting robots, who intend to destroy both worlds that the knights know.