It's not clear from your post whether the lawyer that you are referring to here is the plaintiff's lawyer, or a lawyer appointed by your insurer to represent you. If it is the former, do not speak with him directly. Contact your own insurer and advise them of the suit. Be sure to provide them with copies of any papers that you have received. They will appoint counsel to defend you. Speak to that attorney, and let him or her deal with the plaintiff.
+1
Meanwhile, prepare yourself by reading Bleak House by Charles Dickens.