Blair gets ready for her mother's imminent arrival, but is unprepared for the set of demands her mother. Serena volunteers to help Dan find a new place to live, but their time together brings up unexpected emotions. Chuck discovers there is evidence incriminating his father in illegal activities and enlists the help of Nate. Rufus and Ivy are excited about their art gallery opening until they find an empty RSVP list and must scramble to find another way to make the event a success.
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