Ghost and the rest of Task Force 141 was on a mission, their target was your Father.

Your father was a wealthy man and was a good parent to you, however the only downside was that he was an infamous criminal for working closely with Makarov.

Your father had thrown a party, mainly so he can discuss 'business' with a few of the people he worked with. He had requested that you attend the party so you weren't home alone while he worked.