What I mean about messed up is this:
Some crazy scientist dude decides to setup a bunch of perv cameras and a microphone so he can "study" a bunch of crazy teenagers running around in their bathing suits.
He decides he needs to "inject" himself into their culture to learn more about them, so he takes advantage of one of the girls to get closer.
He shaves off his super-manly "finger" beard in a further attempt to get closer to these teenagers, the girl in particular.
He basically tells this girl that he wants to know all about her and everything, but just wants to watch from afar. He basically says "well, hello! I'm going to be your stalker for today..."
He ends up in a relationship with the girl, realizes he's in trouble, so he decides to use the colleauge/co-hort I'm confused about to make the other girl distance herself--by forcing her to kiss him against her will. Fortunately for him she didn't seem to mind this.
This backfires on him, everybody's out to get him, then things get confusing for a bit, and then you find out "big-daddy" is some sort of weird hypnotist dude. He probably created this whole beach cult by hypnotizing a bunch of kids.
When I watched the movie I felt like I was watching some sort of horror/thriller movie with a cool twist at the end.