Why don't you read the whole story. They are underage and were reported missing to the police. When the cops couldn't find them dad went looking. No one at the party would give them a ride home. Sounds like they were being held against their wishes by a bunch of drunks. Yeah, dad is the bad guy, alright.
Let me see if I got this right. You're at a party enjoying yourself when two girls you don't know from a hole in the wall, come up to you and demand you drive them back home to their dad. So, if you don't drive them home, you're holding them against their will? Huh? Double huh?