  Previous X-ray works on Mrk 1239 have revealed a complex Narrow Line Seyfert
1 (NLS1) that exhibits substantial absorption and strong emission from both
collisional (CIE) and photoionized (PIE) plasmas. Here, we report on
deep-pointed observations with $XMM{\rm -}Newton$ and $NuSTAR$, along with
$Swift$ monitoring, to understand the $0.3-30$ keV continuum emission and the
central engine geometry. A strong X-ray flare, where the AGN brightens by a
factor of five in $\sim30$ ks, is captured between $4-30$ keV and can be
attributed to a brightening of the primary continuum. However, the lack of any
variability below $\sim3$ keV on long- or short-time scales requires complete
absorption of the AGN continuum with a neutral medium of column density $\sim
10^{23.5}{\rm cm}^{-2}$. The timing and spectral properties are consistent with
a blurred reflection interpretation for the primary emission. The variability
and presence of a Compton hump disfavours ionized partial covering. The neutral
absorber, if outflowing, could be crashing into the surrounding medium and ISM
to produce the low-energy continuum and CIE. Scattered emission off the inner
torus could produce the PIE. The intricate scenario is demanded by the data and
highlights the complexity of the environment that is normally invisible when
overwhelmed by the AGN continuum. Objects like Mrk 1239 serve as important
sources for unveiling the interface between the AGN and host galaxy
environments.
