waurpel I'll help you out with the synopsis. Here's an idea:
In a world where rank, blood ties, and religion are intertwined, Silika Everest lived an idyllic life as the third child of the Marquess of Oblon, spending her carefree life playing with her siblings and friends to her hearts' content.
Until one fateful day, when she fell off a tree and injured herself. When she woke up from the injury, everything seemed...wrong and confusing. She couldn't hear a thing. Now, her family despises her, and she doesn't know why. Silika's entire world had been flipped on its head.
That day her quiet life began—an unforgiving life where all odds were stacked against her.
Basically, I added the part "spending her carefree life playing with her siblings and friends to her hearts' content." to give more context about Silika's daily life. I also described the accident without going into too much detail (hopefully). Other than that, I also fixed some grammar. I hope my idea can help you formulate your synopsis.