Despite not finding any answers, the other encourage Tom to keep finding answers and D'Angelo finally shares his haystacks with his friends. Jun finds a word carved in the tree, but when Tom translates it, all it says is 'haddock', which they think refers to the fish. Tom realizes the book wasn't talking about a final resting place, it was a place his ancestor came to relax. When Eugene sits down to take a rest, he accidentally discovers the gravestone described in the book, which is actually the base of a tree. In gratitude, the Vine Tails return the book and tablet, but the dragon club is too tired after the day's events to keep looking for the gravestone. Afterward, the dragon club helps make a safe path of rocks through the carnivorous plants so the Vine Tails can reach the fruit tree safely and they don't need to trick dragons anymore. Thunder, Tom, and the Vine Tails work together to free all the dragons. The Vine Tails accept the trade and form a chain to pull Thunder free. He climbs to the tree and offers to trade the book and the tablet to the Vine Tails if they help free the captured dragons. With the dragon's getting closer to being eaten, Tom takes drastic action and steals Alex's tablet. The group tries to pull Plowhorn out with a vine, but the plant's pull is too strong to pull free from. The dragons attack the plant's mouths, but they are resistant to their blasts and resume slowly pulling them in. D'Angelo explains some animals understand basic bartering and manipulation, but Tom is more concerned about the plants. The group realizes that the Vine Tails took their things to lure them into the vines so they could jump across the dragons and get to the tree full of their food safely. Suddenly, the Vine Tails drop the book of dragons and climb on the captured dragons to reach a fruit tree that the carnivorous plants surround. As the plants slowly pull the dragons toward their carnivorous mouths, the dragon riders jump to safe ground to find a way to help them. While trying to lure the Vine Tails, the vines on the ground wrap around dragon club's dragons and the group discovers they are trapped by carnivorous plants that feed on dragons.

The group follows the Vinetails into patch of vines and D'Angelo unwillingly is made to lure them with his haystacks. Plowhorn takes back the book of dragons, but the Vine Tails steal it back by forming a chain that's so strong, that not even she and Thunder working together can stop them from getting the book back. Eugene gets back D'Angelo's haystacks, but D'Angelo takes them back before he can eat any, and Wu and Wei help Alex recover her tablet. The dragon club goes after their stolen possessions, but the Vine Tails agility and intelligence makes them hard to catch. Suddenly, a pack of dragons called Vine Tails steal D'Angelo's haystacks, Alex's tablet, and the book of dragons. They fail to find the gravestone among the rocks and during the search. After Eugene fails to snag on of D'Angelo's haystacks, Alex finds a clearing with some stones that the group investigates. The dragon club enters the Nature Realm and Tom begins searching for stones sharing the design shown in the book to find the gravestone. He also found a passage mentioning his ancestor's resting place is somewhere in the Nature Realm where there would be a gravestone with his ancestor's name on it. While he knows who his ancestor looked like from the illustration in the King's Realm, all he knows about his name is that the word ' hiccup' was used to describe him. He explains he figured out that since his family's Viking helmet had the key to the container holding the book of dragons, he must be descended from the author.

Tom arrives and reveals he has discovered the key to understanding his connection to Thunder and the hidden world. While he willingly shares most of the snacks, he refuses to share his grandmother's haystacks, despite the other's efforts, and Eugene resolves to steal one for himself. While the dragon club, except for Tom, feed their dragons, D'Angelo reveals his grandparents sent him a care package of snacks. This media creates conflicts within the How to Train Your Dragon story.

Fifth harmony vines