Long ago, the peaceful, cube-shaped world of Quarton, home to shapeshifting living bricks known as Tenkai, was devastated by a conflict between the Corekai and the Corrupted, a faction commanded by the ruthless warlord Vilius, who sought to seize Tenkai Energy for his own ends. Only the Tenkai Knights—Bravenwolf, Tributon, Valorn, and Lydendor—were powerful enough to stand against him. In a final desperate move, Vilius summoned the immense Tenkai Dragon, which was ultimately vanquished by the four Knights, causing its remains to scatter across the planet. Although these champions vanished from sight, the Corrupted have resurfaced with renewed strength. In the year 2034 on Earth, four teenagers named Guren, Ceylan, Toxsa, and Chooki discover an interdimensional gateway to Quarton. There, they are selected by the Guardians to become the next generation of Tenkai Knights, tasked with stopping Vilius from seizing control of both worlds.