Tom hatches an unorthodox plan to use a Monstrous Nightmare to test Alex's new fire suit, endangering the secret of dragons.

After a fight with her mom, Jun joins Tom on an adventure into the Fire Realm, where her knowledge of myths saves the day.

When a tiny Fireworm dragon ends up at ICARIS, Alex must decide between her mom's excitement and keeping the dragon secret.

During an attempt to get displaced Fire Gronckles back to their native realm, D'Angelo accidentally feeds them Catastrophic Quaken eggs.

Much to Jun's chagrin, Eugene finally discovers the secret of dragons and demands to become a Rider, but he must bond with a dragon before he's let into the group.

When the Riders discover that Magma Breather is very sick, the only way they can help is to sneak the huge and heavy dragon into the ICARIS infirmary without being caught by any of the scientists.

The Sky Torcher and Flame Throwers invade the Crystal Realm; Tom must conquer his demons and bond with the Fault Ripper to defeat the Sky Torcher.