Call and track down the family court and file a writ to have access to your kids. Do it Monday morning if they aren't open tomorrow SD. You have a legal right to see them and she will have to prove that you are doing something before they refuse your plea.
Offer to do it under supervision if they try to deny your request and also ask the court to assign the supervision done by someone FROM the courts... not your wife or any family members. That can help you later on in any custody battles.
Also request from the issuing court what the reason for the TRO being filed is. Be ready to face the judge, but you need the reason for its issuance before seeing the court. That way you can have a defense planned. Walk in empty handed and you'll lose.