In this episode Guren, Chooki, Toxsa, and Ceylan are split into two groups, Guren and Chooki is group 1 and group 2 is Toxsa and Ceylan. During this episode Guren and Chooki try to find a clue about the dragon key. They find a sign which takes them to another and another (at one of these signs they spot Gen). They finally arrive at the dragon key and have to go through booby traps. Guren finally gets through and takes the key. Meanwhile, Toxsa and Ceylan are fighting such a hard battle they have to go titan mode. They seem to be holding the Corrupted off but more keep coming. Suddenly Dromus shows up in the end and says, "everything is going according to plan Vilius."
The boys split into two groups, Guren and Chooki try to find out anything they can about the White Dragon Key. They find a sign which takes them to another and another, all of which are being placed for them to find by Gen. They finally arrive at the key and have to go through a booby trap to obtain it. Guren finally gets through and takes the key.
Meanwhile, on Quarton, Toxsa, as Valorn, and Ceylan, as Tributon, along with Beag, stand guard over the Dragons Nest, the one place the Tenkai Dragon can be revived. The Corrupted eventually attack them on mass and the boys have to go into Titan Mode. They seem to hold the Corrupted off, but Dromus shows up in the end and says that everything is going according to his plan.
In the episode
- Guren and Chooki finally find the white dragon key.
Note: All characters are listed in order of their first appearances in the episode. The time they appear is the time from the Japanese dub.