Something rather unfortunate happened at the party while you were drugged.
It is with my sincerest apologies that I inform you that you had been taken advantage of while under the influence of whatever was in the punch bowl.
Luckily for you, someone stopped the rapist from finishing the job. You will be very happy to know that the rapist has been sent to jail.
You speak with a therapist to get over the pain of getting raped at the party.
As months pass, and a painful visit to the police station, you learn how to overcome the pain of this terrible and unfortunate incident.
You start dating, with some trouble at first, but end up dating the one who saved you.