Hiccup's eyes quickly adjusted to the darkness of the cave. She and Toothless stopped running when they reached a large room of the cave.
Toothless saw a pile of sticks with some small rocks surrounding it. He shot a small blast at it and illuminated the cave, revealing the large sketch of a map on the cave ceiling.
"That's it!" exclaimed Hiccup, "The map to the Isle of Night! I gotta copy this down." She pulled out her sketchbook. But as she reached for the pencil, she felt some strange electricity, rushing for her palm. She quickly pointed her hand at one of the walls, letting a bolt of lightning obliterate a boulder, unfortunately, a boulder that was supporting the cave ceiling.
The roof of the cave began to crumble. Dust began to cloud vision.
Hiccup quickly grabbed her pencil and drew the map. When she finished, she put the sketchbook back in place and ran for Toothless. But as she mounted her dragon, she saw the last hint of light disappear. That only meant one thing, "The cave entrance. It's closed down." Hiccup looked down at her friend, "We're stuck in here."
"No." said Toothless, "There's no way I'm dying like this. No way!" Toothless let out a loud screech, letting a blue ring erupt from his mouth. Hiccup watched as the ring travelled farther into the cave, then bounced back to them moments later. Toothless suddenly ran in the direction that the ring came from, carrying Hiccup with him on his back.
Hiccup watched Toothless carry her deeper into the cave, the light slowly returning. After about a minute of running, Toothless spread his wings and flew out of another cave opening. Hiccup was temporarily blinded by the sudden light greeting her eyes.
"Hiccup!" called Astro, who was just watching the Thunderdrum fly away, as he finally managed to drive it away, "You made it!"
"Please don't ask me how," replied Hiccup, "because I have absolutely no idea."
"Perhaps you should ask Toothless." Astro let Hiccup look down to Toothless, who purred and growled.
After Toothless explained to Hiccup, the girl looked up to Astro and repeated, "Apparently, Toothless used something called 'echolocation' to help us get out. He made this sound. When it bounced back, he used it to navigate the cave."
"Hiccup." said Astro, "You have got to learn how to do that!"
Hiccup smiled. Then her smile disappeared, "We have to help Snotlout! Who knows what that Changewing did to him!"
Hiccup and Astro flew their dragons back to the other cave entrance.
They didn't have much to worry about, as the Changewing was holding Snotlout close to him, as if hugging him. He chewed some Dragonnip out of the ground and spat it on Snotlout's helmet.
"Awwww." said Hiccup in a sweet tone, "You made a new friend."
"Yeah?"asked Snotlout, "He's not as friendly as he looks."
"I'm a girl!" growled the Changewing.
Hiccu chuckled, "Snotlout, your friend here is a girl."
The Changewing looked at Hiccup in disbelief, "You can understand me?"
"Yep." answered Toothless, "She's part dragon."
"Really? What do your wings look like?"
Hiccup showed her wings to the Changewing. "Um.. would you mind letting the kid go? He's not really used to being hugged by a Changewing."
"Oops. Sorry. I was just keeping him safe from that Thunderdrum. Here." The Changewing wrapped her tail around Snotlout's leg and held him out for Hookfang to catch him.
When Snotlout was back on the back of his dragon, Hiccup nodded to the Changewing, "Thanks."
"You're welcome. I gotta go. My babies are hungry. See ya."
The Changewing flew away to tend to her babies.
The twins flew their dragon to join the group, Ruffnut smiling, "See, Snotlout? Our plan did work: Keep the Changewing busy until Hiccup shows up."
"Hiccup." called Fishlegs, "Did you find anything to help us?"
"Nothing." said Hiccup, "Nothing but a map to the Isle of Night."
Everyone cheered. After their quick reunion and celebration, the teenagers and their dragons flew back to Berk.