Four teenagers use a machine to teleport to another universe named Korton where they become legendary Tenkai Knights. They battle villains, dragons, and monsters with weapons like swords, bows and arrows, and numchucks.
Long ago, the peaceful, cube-shaped planet Quarton was torn by war between the Corekai and the Corrupted, led by the evil Villius. Only the Tenkai Knights - Bravenwolf, Tributon, Valorn and Lydendor - were strong enough to defeat Villius and his forces. After the warlord's defeat, neither Villius nor the Tenkai Knights were seen again.
Now on planet Earth in the year 2034, Villius has returned and plots to take control of both Quarton and Earth. Four human boys - Guren, Ceylan, Toxsa, and Chooki - are chosen to be the new Tenkai Knights to defend both Earth and Quarton.
