You will automatically be convicted of the charge.  This is known as a 'default conviction'.  The default conviction is equivalent to a guilty finding.
What happens if I plead guilty to a violation that results in 5 or more points?
If you already have 3 or more alcohol-related convictions on your entire driving record, a plea of guilty to a violation that results in 5 or more points may result in the revocation of your license under Part 132 of the Commissioner's Regulations.  You may want to consult an attorney before entering your plea.
What happens when a TVB ticket is not answered?