Although it was Bertha's birthday, she hadn't a special day. She had to help in her stepsister's party. But a visitor noticed Bertha and her horrible dress and her shyness. He, who was a doctor, get interested but the stepmother and her daughter wanted the doctor to marry the stepdaughter.
Bertha was as a servant at the house and had to ask her stepmother everything. But the doctor managed to get a way for Bertha to leave the house to and fro. The story is like a Cinderella story. A nice story. Easy to read. And sure it will have a happy end.