20 years ago I entered a guilty plea to a crime I did not commit 273.5 CA penal code. I was addicted to drugs at the time as well as under the influence when I entered the plea and wasn't listening to the judges instructions. I was also in extreme duress due to family circumstances. I left state before sentencing and now 20 years later for pulled over and now have a court date for failure to appear and sentencing. Is there any hope in filling a MOTION to VACATE a GUILTY PLEA?