While waiting for Daryl and the crew to get back from the vet hospital with supplies, Rick and Carol go on their own run for whatever they can find (food, medicine, whatever).
They find a lot of stuff (including a couple of survivors), but it's obvious there's an uncomfortable 'wall' between them.
Meanwhile, Daryl, Michonne, Tyreese and Bob are fighting walkers while retrieving meds. When it's discovered that Bob nearly gets himself killed for some liquor, Daryl takes it from him and gets ready to throw it. It's then that Bob tells him to stop and puts a hand on his gun!! Daryl gets in his face and it's not exactly comfortable on the car ride back.
But the twist of the episode is RICK BANISHES CAROL FROM THE GROUP!!!
Check it out from those involved:
Aim high. Run fast.