The work of the British artist-designers James Russell and Hannah Plumb, collectively called JamesPlumb, is known on the design and fashion circuits for its quirky, sometimes haunting mash-ups of antique or simply discarded furniture and objects. The couple's creations are shown regularly at Spazio Rossana Orlandi in Milan, and they designed the interior of Hostem, the men's clothing store in London's Shoreditch neighborhood (and its recent addition, Chalk Room), as well as collaborated with the photographer Bruce Weber on a window at Selfridge's in 2010. "Goodnight Day," the duo's new exhibition curated by Giancarlo Camerana at Blancpain Art Contemporain in Geneva, takes a white-cube gallery space, and - true to their Dickensian-punk-bricolage aesthetic - transforms it beyond recognition, getting rid of the daylight, as the show's title implies. The mysterious, dark-walled space contains new pieces and variations on earlier themes. "Good Night Day" combines a wooden chest, its drawers mostly missing, with a carved and gilded frame, its right side gone and whatever once filled it replaced by the artists with mirrored glass that fills only half the frame. Russell and Plumb found both pieces in a Belgian warehouse, and, Russell explained, thought the two pieces "could have a life together." For "Triffid Light," the couple "released" the painted metal flowers that adorned a pair of 1950s wastebaskets and wired them for electricity, arranging them in a "pot" made of wood from apple crates. A three-seat sofa and two armchairs, the latest variations on JamesPlumb's "Concrete Stitches" series, are called "To Love and to Cherish," in keeping with the other pieces in the series, named after wedding vows that symbolize the marriage of two different materials. The 19th-century furniture, which is stripped down to its carved wood frames, is given pigmented cast-concrete "cushions." An older piece, "Charles Munn," joins an ancient-looking roller skate with an articulated metal lamp that may have been used in a Lancaster bomber in World War II. It was named for a man whose wartime letters to his sweetheart are part of the artists" collection of old correspondence. Russell and Plumb resist being labeled as either designers or artists (both studied sculpture), and, although they're constantly reusing old material, don't like to be called upcyclers. "That's not where we're starting from," Russell said. They aren't part of the fad for old-timey interiors that make you think you've wandered onto the set of "Gangs of New York"; their work is conceptual rather than theme park. But neither are they stuck in the 19th century. A series of ceiling lights for the London headquarters of Bloomberg were made with all kind of detritus from the modern office. "Goodnight Day" runs through Feb. 17.