Tenkai Knights: The Dragon's Key

On Earth we meet Gen, a new student in the school. He is cool and aloof. Guren tries to bond with Gen because not so long ago Guren was the new kid, but there is something strange about Gen. On Quarton, the boys find Slyger attacking Beag and his troops. Slyger intends to steal the third Dragon Cube. Slyger gets on a Griffon mech-beast and attacks the heroes. Tributon is determined to stop Slyger from taking the Dragon Cube. His Tenkai Energy force grows strong with his determination, which unlocks his Titan Mode! Tributon in Titan Mode successfully recovers the Dragon Cube from Slyger! Moments later, a shadow suddenly appears and takes the Dragon Cube. It looks like Bravenwolf? "Who are you?" Asks Tributon. The mysterious Knight tells Tributon "Leave me be" and disappears swiftly with the third Dragon Cube. The four boys return to Earth. On the edge of town, they find Gen. Ceylan feels something off about Gen, but thinks it is just his imagination.

Concerned with the boys growing Titan Mode strength, Vilius and his henchmen enlist the services of a mighty Warhorse mech-beast. The Warhorse proves too much for our heroes.and after Lydendor (Chooki) gets stung with a laser blast, our heroes make a narrow escape to earth. Back in the human world, Chooki is dribbling a soccer ball through a crowd of defenders.He fakes out the goalie and the clock ticks down. 3. 2. Chooki has a wide open goal and he shoots. CLANG! He hits the post. The game is over. Chooki has lost the game. Chooki has lost his mojo! Chooki suffers one clumsy mishap after another, and his buddies try to pull him out of his funk. The friends decide the only way for Chooki to get back his mojo is to return to Quarton and defeat the Warhorse. Only by working as a team can they counter Chooki's/Lydendor's clumsiness. Lydendor is energized by his friends support and miraculously goes into Titan Mode! Back in the human world Chooki has his cool back.

The heroes are set to go on a quest to some ruins that may contain the fourth Dragon Cube. On earth, the boys are on a school trip to an excavation site of some ancient ruins. On closer inspection, the boys notice these ruins look freakishly similar to the ruins on Quarton. The boys don't know it yet, but these ruins are linked to the ruins on Quarton. The boys go to Quarton and head to the ruins. Again, the boys notice the similarity to the ruins they just visited back on Earth. Along the way, they encounter multiple booby-traps. The boys combine to become the Firebird and blast their way out of danger. Deeper into the ruins, the boys discover the fourth Dragon Cube.

Toxsa is frustrated that he still can't unlock his Titan Mode and secretly starts training on the side. Matters turn for worse when Valorn (Toxsa) is taken prisoner and Vilius "hacks" into Toxsa's navigation system and installs a bug that controls and corrupts his Tenkai Energy. Toxsa is now a secret agent and that allows Vilius to find out a lot about them. The other heroes don't know, but they suspect something because Toxsa is acting really strange. When they return to Earth, Vilius can still tap into his subconscious. Vilius learns about the Portal and the four boys in the human world. Toxsa, however, uses his and robo-programming skills to override and reverse the bug, allowing him to gather important information about Vilius. The invigorated Valorn finally succeeds in unlocking his Titan Mode, and our heroes discover an all new formation to defeat Granox and gang. Toxsa returns to his normal. or at least normal for Toxsa - self.

Our boys have all but one of the cubes of the Tenkai Dragon. Granox and Slyger have the final piece. Granox and Slyger use the piece as bait and lure the Heroes in. while The Dark Knight steals all the other dragon pieces. Vilius and The Dark Knight, Dromus, are successful and now have all the pieces, but the boys won't give up so quickly. They amp up to Titan Mode and win back all of the Cores and form The Tenkai Dragon. Bravenwolf uses his Tenkai Energy and the key (the Seiken) to awaken and take control of the The Tenkai Dragon. it lives!

With the Tenkai Dragon, the boys are heroic. Tenkai Energy balance is being restored and Quarton is fading away from the human world. On Quarton they are celebrated as heroes. They beat back Vilius and his forces. they destroy one of Vilius' fortresses. At the end of the episode, The Dark Knight, Dromus, turns the tables on the good guys and captures the Tenkai Dragon. This is epically bad. Dromus delivers the Tenkai dragon to Vilius.