That sounds like a compelling setup—modern, romantic, but with high-stakes drama and cultural clash. Here's a polished version of your summary that could work as a logline or back-cover blurb:

When Anora, a sharp-witted young woman from Brooklyn, falls for and marries the son of a powerful Russian oligarch, her life takes a Cinderella turn. But when news of the impulsive union reaches Moscow, the fairytale begins to unravel—his formidable parents land in New York, determined to erase the marriage and drag their heir back home. With love, identity, and family legacy on the line, Anora must fight for her future in a world far outside her own.

Would you like to expand it into a full synopsis or treatment? Or are you looking to workshop it as a screenplay, novel, or maybe even a stage play?