You should hire a good lawyer and contest the case. The divorce is not granted on flimsy grounds. It can be granted due to cruelty (Mental or Physical), If the marriage was due to fraud etc, Leporasy, Extra matial relation ship etc.
there must be some valid grounds, which has to be proven in the court by your wife and then court will give you a chance to defend the same.
The case has to be filled in an appropriate family court (otherwise a district court). Have you received any summons from the court or this is an academic question.