@Author
In any criminal case rather court case, both the parties are required to be present so that a fair trial can be held. Moreover in a criminal trial the accused/respondent is requried to assure safety/security to the complainant.
If your case has substance and you have material to show to the court that you are innocent and your wife has filed the case on frivulous grounds with ulterior objectives, then, you can seek anticipatory bail. Once granted you can fly to India any time you want.
Power of attorney does not displace your physical presence. So you shoudl seek exemption from personal appearance due to inter-continental distance.
//peace
/Saurabh..V