The Children lived with the Fred people in their town even though they weren't their real parents, but it was because their real home was too dangerous and at war. The Freds were very nice and never did anything wrong.
The children went back to their real home because the war ended and the parents wanted their children back. The Fred people didn't want them to go and they didn't know what to expect, the Freds couldn't go with their kids.
All of the children went to live with their real parents and they were mean, strict and brutal, unlike their Fred parents. The main character, Rosi, had a parent who slapped her for talking back.
Rosi and her brother lived in a creepy house with a mean woman and a blind old man who weren't very nice, they had to do lots of chores like selling apples in the market and cooking food for their parents.
Rosi was sent to prison for starting a fight in the market by telling everyone that someone was kidnapped and got beat up because she scared people right after they finished a war. When she was in prison the priest visited her and gave her a bible with a key to escape in it because he knew she was a good person and had a little brother to take care of.
Rosi decided to escape the town of mean people with her little brother and another little girl. When they were leaving they saw one of the Freds who told them that they were aliens and they lived in a different universe instead of Earth so when they were on the airplane they weren't flying, they were going to a different universe.