Wings are only good to a Pegasus if they're not injured or broken.
Rainbow found that out the hard way as she helped out Fluttershy with one of her animals, the downside is where she crashed.

Money Banks is a wealthy pony and he didn't appreciate the unexpected visitor, he does, however, make use of the situation.

His son Gold Banks became housebound due to an incident and is in need of some company.

Feeling guilty over the situation, Fluttershy agrees to work for the Banks in order to pay off the hospital and damages bill, however, she is unaware of what was in store for her.