What to do police filed a case for drunk driving

Actually me and my friend was coming on highways in pulsar bike at night 12.30 suddenly one car came to us from back side in fear we have taken left but we felt in left side of road with small injuries.... After wake up about 30 meteres one old man felt in road.... After some people who's coming on road that people called to ambulance they shifter us to hospital ....after treatment we returned home morning and we asked about bike.... In my home they told that ur bike is in police station...... I visited police station to collect bike they enquiry about everything card and dl and insurance I told everything is there... Then he told to come afternoon.... Then I visited on afternoon he gave fir that I made accident under 304 a section.... I told u didn't did this... Then he explains nothing will happen for u.... Only to claim insurance that he told.... I was consumed alcohol on that even in hospital they given same report..... Please tell me what will happen in my case