They are definitely going to turn David around from the "bad" side to our side. I think the beginning of the episode will go like this:
I don't know if Max will be dosed and photographed by Jefferson, and she will wake up the next morning in her dorm like Kate because I think she actually saw him and in the teaser she says "please, don't do this" so she seems pretty aware of what's going on and Jefferson is most likely going to kill her, so probably before that, Max somehow gets a hold of her picture with Warren and jumps into it, right after that, two options depending on our choices: the girls go to the hotel David's staying at (there was a reservation paper with even the room number next to the phone on Chloe's house) or to Chloe's house and they ask for tracking help. He'll track Nathan and their luring plan won't work, so Jefferson will be left waiting at the junkyard and the girls will confront Nathan. From there, it could go anywhere....