This is the blurb:

Unable to prove that she's the missing princess, and unable to bear life under Lady Tremaine any longer, Cinderella attempts a fresh start, looking for work at the palace as a seamstress.
But when the Grand Duke appoints her to serve under the king's visiting sister, Cinderella becomes witness to a grand conspiracy to take the king – and the prince – out of power, as well as a longstanding prejudice against fairies, including Cinderella's own Fairy Godmother.

Faced with questions of love and loyalty to the kingdom, Cinderella must find a way to stop the villains of past and present... before it's too late.