  Using observations of Spitzer/IRAC, we report the serendipitous discovery of
excess infrared emission from a single white dwarf PG 0010+280. At a
temperature of 27,220 K and a cooling age of 16 Myr, it is the hottest and
youngest white dwarf to display an excess at 3-8 $\mu$m. The infrared excess
can be fit by either an opaque dust disk within the tidal radius of the white
dwarf or a 1300 K blackbody, possibly from an irradiated substellar object or a
re-heated giant planet. PG 0010+280 has two unique properties that are
different from white dwarfs with a dust disk: (i) relatively low emission at 8
$\mu$m and (ii) non-detection of heavy elements in its atmosphere from
high-resolution spectroscopic observations with Keck/HIRES. The origin of the
infrared excess remains unclear.
