Arin, Zane, and Cole make a shocking discovery in the Monastery of Gates as they defend the Dragon Horns; the depowered Elemental Masters clash with the Wolf Mask army.

Arin learns a devastating secret about the Merge and confronts Lloyd as Cole stays behind to protect the dragon horns. Sora faces off against Nokt, and Wyldfyre is too late to stop the manipulation of the games.

Roby and Bleckt visit an injured Lloyd to complete the transfer of Zeatrix's powers as Arin links Bleckt to a clue in his investigation and follows him back to a secret office, where Wyldfyre has an idea to uncover his plans.

Arin follows a lead in his investigation of the missing horns to the Temple City Museum; a tour from Roby reveals a deeper connection between the Tournament and Source Dragons.

Arin grapples with Ras's accusation that Master Wu caused the Merge while the Ninja complete the Temple Race and win their way back into the Tournament.

In her match against Cinder, Wyldfyre's temper proves a liability in and out of the arena, and in order to stay in the Tournament, the Ninja invoke an ancient rule that requires them to compete in a race outside of Temple City.

The Tournament of Sources begins, and Nya faces an unexpected opponent. Meanwhile, Kai and Bonzle find a connection outside the Nether-Space.

A banquet for the Elemental Masters and an assassination attempt against Lloyd introduce new threats to the Ninja at the tournament.