This is exactly why you purchased title insurance. Your title insurance carrier should step in to defend against this claim and clear the cloud on title.
Before you go hiring an attorney in North Carolina, flying out there yourself, or calling the plaintiff and muddying the water or disclosing something you shouldn't, I suggest discussing more details with the attorney who handled the closing.
There's actually no particular reason they wouldn't be "on your side" in this situation. This is simply a cloud on title that they need to correct. And they were most likely the agent who sold you your title insurance policy, so they would be the ones you work with to submit your claim.
You've obviously already been in touch with them, I would suggest following up to confirm the following:
-Are you in fact the agent for my title insurance policy? (If not, clarify who was, and ask them the following)
-Who is my title insurance carrier and what is my policy number? (You should have this with your closing docs, or you may have received it in the mail a few weeks after closing, but still worth confirming.)
-Will you be opening a claim with my title insurance (or have you already?) - If not, why not? If so, when, and can I get my claim number?
-Who, how, and when are we going to respond to the hearing in December? (Note: Your title insurance carrier may assign counsel for this, or may work to get it postponed. Attending the hearing, or getting involved at all, may be the last thing they want you to do at this point. If they want/need you to attend or respond, they will let you know - But clarify with them either way.)
-What is the process to rectify this beyond the hearing? How do we clear the cloud on my title?
This probably goes without saying and may not be an issue, but it's worth noting you probably don't want to sell the property until this is resolved. Adding another contract to the mix would only further complicate things.