My folder gone

I was using Unity Plastic SCM and created an empty repository on the web page and subsequently downloaded the client to create a workspace. I added the project files to version control, and subsequently when I was ready to commit, the client reminded me that I needed to synchronize the repository before I could perform any other actions. After I clicked on synchronize, the client deleted the project file I was ready to commit, and now I can’t find my file deletion record in changset.