|“||The future of our entire civilization rests on this egg's survival. If it fails to hatch, the Great Protector will not have an heir. And if there is no Eruptodon to eat the lava from the volcano, the island and our tribe is doomed.||”|
|“||When the Great Protector can't take her egg into the Great Volcano, Hiccup and Fishlegs must go into the dangerous volcano with the egg before it's too late.||”|
Hiccup and Fishlegs busy themselves by innovating with their ingenuities at sync, so much so that it annoys the rest of the riders nearby. They are interrupted when a terror mail from the Defenders of the Wing request their help. The Eruptodon has given birth to her one and only egg but due to her age it weakened her, unable to deliver the egg to the sacred nesting site for its nourishment, located within the Grand volcano. Mala's only option to ensure her tribe's survival is for her and the dragon riders to deliver the egg themselves before the lava pool seals the nest's entrance. The riders leave the matter to Hiccup and Fishlegs. To their surprise, they disagree over which of their respective dragon can perform the task. Mala settles the argument by choosing Hiccup and Toothless.
Hiccup, Mala, and Toothless make their descent for the cavern, but Toothless's prostethic tail gets caught up by lava spouts and are barely able to turn back. The lost time begins to cost the egg's life causing a panic amongst the populace, but Mala reassures its survival. Hiccup and Fishlegs set aside their awkward disagreement to resume finding a unified solution for the egg but fails when both draw different ideas. Astrid breaks it up by referring to Fishlegs' earlier suggestion that it should be a Gronckle that enters the cavern, to which Mala agrees as well.
Fishlegs, Hiccup, and Mala all mount Meatlug in their second attempt to enter the nest. Despite a Gronckle's slow pace, they manage to avoid the lava spouts and enter the cavern. Mala guides them to the nesting site that is based at the end of a labyrinth of dark tunnels. The three stumble across a cave painting that Mala deduces was made by old ancestors that sacrificed themselves to deliver the Great Protector's egg, but Fishlegs points out that the painting depicts small dragons as well to which Mala has no explanation. As it turns out, it was referring to a flock of red Night Terrors that suddenly engulfs them. Hiccup tries to draw it away with its flame sword but these night terrors can eat its fire. Meatlug tries to rescue a separated Mala, trying her best to hold on to the egg. Hiccup and Fishlegs's continued asynchronous decisions leave Meatlug confused and unable to fight her way to Mala's aid, resulting in the egg's lost to the night terrors. This goes on that it even causes them to lose sight of Mala when Hiccup and Fishlegs can't agree on which direction to go to find the night terrors.
Meanwhile, Astrid worries that the lava is rising dangerously near the only exit from the nest. Although Throk is certain that they'll succeed as Mala is familiar with the tunnel network, he agrees that they may need to take action and assist their return but the lava is too unstable for their dragons. The Twins decide to use Hiccup's diving bell for them to use in extracting Hiccup, Fishlegs, and Mala. Throk believes the Diving Bell would resist the lava's heat by having it coated in Eruptodon saliva. Astrid and Throk enter the diving bell as Barf and Belch begin swinging it so that they can jump for the cave. However, the chain holding them up can't withstand the heat that it breaks apart, dropping the diving bell to the lava.
Hiccup and Fishlegs eventually reunite with Mala but she heads straight for the egg's rescue, being taken away by several night terrors. Mala repossesses it but the night terrors will not let her move any further. Hiccup and Fishlegs begin to both realize about the night terrors' true intention with the egg. Mala refuses to hand over the egg to the two but both reassure her they have a plan to ensure the egg is delivered. When Mala passes it over, she is shocked that Hiccup and Fishlegs decide to give it up to the night terrors. They explain to Mala that the cave painting was actually an instruction for any of Mala's tribe to deliver the Eruptodon egg to the night terrors as they were meant to carry it to the nesting site. The caves begin to rumble as lava begins pouring in the cave system.
Meatlug manages to slip out of the almost filled cave, but they have to turn back when they encounter Astrid and Throk stranded in the lava pit. They reach Astrid but Meatlug struggles to maintain stable due to the extra weight. Seeing this would endanger all their lives, Throk makes the hard decision to stay so that her queen may live. Luckily, the Great Protector regains her strength and comes for Throk's salvation by lifting the diving bell herself to the surface. Having completed their mission, the riders head home for Dragon's Edge.
As the lava pool floods the caves, it makes it way to the sacred nesting site where the Eruptodon egg is placed at its center. The night terrors watch the lava reaching the egg and begin to fill the whole cavern. Their vows fulfilled, the night terrors make their exit as the egg begins producing a stable heart beat, reassuring the birth of a New Great Protector for the Defenders of the Wing.
- Jay Baruchel as Hiccup Horrendous Haddock III
- America Ferrera as Astrid Hofferson
- Christopher Mintz-Plasse as Fishlegs Ingerman
- Zack Pearlman as Snotlout Jorgenson
- Andrée Vermeulen as Ruffnut Thorston
- T.J. Miller as Tuffnut Thorston
- Adelaide Kane as Mala
- James Arnold Taylor as Throk
- Night Fury
- Deadly Nadder
- Monstrous Nightmare
- Hideous Zippleback
- Fire Terror
- Terrible Terror
- It is revealed that the Great Protector is a female Eruptodon.
- It is also revealed that a female Eruptodon can lay only one egg during its lifetime.
- This is the first episode where Tuffnut and Ruffnut reveal the secret language they created: 'Boar Latin'.
- This is the second episode that Hiccup is wearing something without sleeves.
- DreamWorks TV Dragons: Race to the Edge Episode Guide. (Copyright 2018). DreamworksTV.