The lodge caved in because of the snow. Roz decided to go into the forest to find logs to fix the lodge. She thought she was picking up a log but it was Dart the weasel and he was frozen to death. She kept walking and saw many dead animals. This winter was too cold for the animals.
Roz saw smoke coming out of the lodge that was across the lake. She heard screams so she went over to it and saw that it was on fire. The moose told her that they put too many logs on the fire. A rabbit told Roz that her baby was still in there. Roz went in to save the baby. She climbed up a tree and the snow fell down and put out the fire.
Brightbill told Roz about the migration. He explained that they got caught in a snow storm and had to hide in a greenhouse. There was another robot like Roz there. The human killed their leader and they just escaped in time. They flew over a factory where robots like Roz were being made. They met a pigeon named Graybeak and she showed them the city.