The ZBZ's are still on edge when they hear their candle is responsible for the Gamma Psi fire, and Casey cracks under the guilt, putting the ZBZ house in jeopardy! Hoping to boost morale and her marketing major, Ashleigh enlists Rusty and Dale in a philanthropic "Geek Auction," but it's up to Casey to play dirty to save the ZBZ's, their house and their Greek rank.