To overcome her performance anxiety, a renowned classical pianist pursues an anonymous affair with a man who is sharply skilled at erotic knife-play.

Thank you!

Thanks so much for all the feedback! All very useful :-)

I like nicholasandrewhalls comment. I think you should set the story around a particular event, e.g. terrified of auditioning for the role of [blank], instead of the vague "performance anxiety."

Focusing on performing at a particular event will allow the audience to lock on an identifiable goal. It will also give her a ticking clock, and goes a long way in setting up the stakes (i.e. "this is that one career make/break moment.").