  We present minute cadence photometry of 31732 point sources observed in one 3
$deg^{2}$ DECam pointing centred at RA = 09:03:02 and Dec = -04:35:00 over
eight consecutive half-nights. We use these data to search for eclipse-like
events consistent with a planetary transit of a white dwarf and other sources
of stellar variability within the field. We do not find any significant
evidence for minute-long transits around our targets, hence we rule out
planetary transits around ~370 white dwarfs that should be present in this
field. Additionally, we identify 49 variables, including 40 new systems. These
include 23 detached or contact stellar binaries, 1 eclipsing white dwarf + M
dwarf binary, 16 $\delta$ Scuti, three RR Lyrae, and two ZZ Ceti pulsators.
Results from the remaining two fields in our survey will allow us to place more
stringent constraints on the frequency of planets orbiting white dwarfs in the
habitable zone.
