Kristoff could see that Anna was shivering. "Are you cold?" he asked.

Anna grinned. "I'm fine." It made Anna feel better that Kristoff was concerned about her.

Kristoff and Sven led Anna and Olaf through a rocky area of the mountains, weaving through valleys and hills. Darkness had fallen, but the northern lights lit the sky with a green glow. Anna hoped Kristoff's friends wouldn't mind that they were stopping by so late.

"Good," said Kristoff, coming to a halt. "Well, we made it. Meet my friends. They're more like family, actually."

Anna looked around, confused. It was a valley of rocks. "They're rocks," she pointed out.

"They're love experts," Olaf said.

"They're experts on everything, really," Kristoff explained. He looked very serious.

Anna thought Kristoff had lost his mind. She started to back away. "Right. Well, thank you for your help, but I'm thinking I'm going to go. Now. Right now."

Suddenly, rocks began to roll toward them. Strange voices called out, saying, "Kristoff's home! Kristoff's home!" As Anna watched, the rocks rose from the ground one after another and transformed into trolls. Suddenly, they were surrounded!

Anna wasn't sure how this information could help solve her problem, but Kristoff didn't seem worried. "Just do whatever they say, and you'll be fine," he advised her.

The trolls climbed over each other to get a good look at Anna.

Hulda pushed her way to the front, thrilled to see Kristoff. Clearly, she knew him well. "He's brought a girl!" she exclaimed with a grin.

Kristoff jumped in. "What she means is, that's not why I brought her here. We need --"

Hulda examined Anna. "Let me see. Bright eyes. Working nose. Strong teeth," she said. "Yes, she'll do nicely for our Kristoff."

Anna finally caught on. They believed she was Kristoff's girlfriend, and that he'd brought her to meet them! "Wait. No. H-he and I aren't…," she stammered. "I mean, he's not, we're not…"

A troll named Soren cut him off. "We know what you need," he said confidently. And with that, the trolls began to tell Anna all about Kristoff's shortcomings. According to them, he was a bit of a fixer-upper, but a little love would make everything right.

The trolls started dancing and singing about love being a force that brings out the best in everyone, even if people have made bad choices in the past. Their excitement was infectious, and Anna and Kristoff were soon swept up in the celebration. Anna actually enjoyed the dancing, and she even let the troll women decorate her hair. Before long, she and Kristoff were moved to an area where they stood in front of the entire troll crowd.

"Wait! What?" Anna exclaimed. "You're getting married," the troll said.

Just then, a mighty shiver shot through Anna and she collapsed. Kristoff caught her.

"Do you, Anna," a serious troll began, "take Kristoff to be your troll-fully wedded --"

"I think someone has cold feet," Soren said. Hulda sniffed. "Nervous jitters is all."

Kristoff held Anna tight. "No," he insisted. "Something's wrong."

Pabbie pushed his way through the crowd. "He's right. Something is wrong," he said. Pabbie walked up to Anna, took her hands, and looked into her weakened eyes. A shiver went through her body as he lifted a lock of her hair, which was now all white. "Anna," Pabbie said in a low voice, "your life is in danger."

Kristoff took hold of Sven's reins. "Come on, Olaf!" he called.

"Hans," Anna answered weakly. "Right. Hans." Quickly, Kristoff scooped Anna into his arms and placed her on Sven's back. He climbed up behind her, nodding his thanks to the trolls.

"An act of true love?" Anna repeated.

"What? No!" Anna gasped.

A hush fell over the trolls. Anna looked at Kristoff as Pabbie continued.

"There is ice in your heart, put there by your sister. If not removed… to solid ice you will freeze," he told her. "Forever."

"A true love's kiss, perhaps?" suggested a nearby troll.

Kristoff paused, thinking. "We've got to get you back to Hans," he said.

"I can't. If it were in her head, that would be easy," Pabbie said. "But only an act of true love can thaw a frozen heart."

Hulda sighed. "Ugh. We'll never get him married, Soren," she muttered.

"Someday, Hulda," Soren replied.

Kristoff tried to stay calm. "So remove it, Pabbie," he said.

Sven turned and headed back toward Arendelle, breaking into a gallop as he left the trolls' valley. The sun began to rise. And one by one, the trolls turned back into stone.

"I'm coming!" Olaf shouted, grabbing Sven's tail. "Let's go kiss Hans!"

Elsa looked down at her shackles. Ice was beginning to spread over them. And ice was forming along the edges of the floor. Elsa's emotions -- and her powers -- were again slipping out of her control.

Elsa was gazing out the small window at Arendelle, now buried in snow and ice. She turned when she heard Hans enter. "Why did you bring me here?" Elsa asked.

Hans carried a torch as he walked down the steps into the dungeon of Arendelle castle. He appeared in the doorway of Elsa's cell.

"I couldn't just let them kill you," Hans told her. Elsa glanced at her shackled hands. "But I'm a danger to Arendelle. Get Anna," she suggested.

"Anna has not returned," Hans said. "If you would just stop the winter and bring back summer… please."

Elsa stared at Hans with sad eyes. "Don't you see?" she said. "I can't. You have to tell them to let me go." Hans walked back to the door. "I will do what I can," he said. Exiting the cell, he locked the door behind him.