Unless the bank is a beneficiary of the cheque it could not have filed the case. Be that as it may, unless there is an order passed by the court directing you to not leave India you are free to go abroad. Needless to add, you will continue to remain amenable to the Indian courts even if you relocate. On your failure to turn up in the Indian court on the hearing a warrant to arrest will be issued against you. You have to take bail and then secure your presence before the court. It is a criminal case, so take it seriously.