Matilda Cook as known as "Mattie" is a 14 year old girl lives in the city of Philadelphia with her mother who owns a coffee shop.
Mattie finds out her friend Polly died from the yellow fever and her mother gets sick. Mattie wanted to stay with her mother but her mother did not want Mattie to get the yellow fever so she told Grandfather to take Mattie out of Philadelphia, but Mattie refuse to leave and she was force to leave her home.
Mattie gets sick and she finds out she has a yellow fever.
After Mattie and Grandfather returns to the city, the coffee house get robbed. And Grandfather gets killed in the struggle with the one of the thieves when he was trying to protect Mattie.
After the epidemic passes, normal life returns to the city. People who went to other cities comes back to the city of Philadelphia. Mattie re-opens the coffee house with Eliza.
Mattie's mother returns. Mattie has grown up into a young woman. She is now responsible for the coffee house and taking care of her mother.