What is the shortest, quickest and best summary about the book "Chains" by Laurie Halse Anderson?

The summary can be like a paragraph long!

Chains opens with a funeral, witch pretty much tells us up front that it's going to be pretty bleak story. Isabel, our heroine, and her younger sister, Ruth, are attending the burial of their owner, Miss Finch's brother about this, though he basically thinks she is making it up.