  A cylindrical plasmonic structure with a concentric core exhibits an
anomalous localized resonance which results in cloaking effects. Here we show
that, if the structure has an eccentric core, a new kind of shielding effect
can happen. In contrast to the conventional shielding device, our proposed
structure can block the effect of external electrical sources even on a region
which is not enclosed by any conducting materials. In fact, the shielded region
is located at a distance from the device. We analytically investigate this
phenomenon by using the m\"{o}bius transformation via which an eccentric
annulus is transformed into a concentric one. We also present several numerical
examples.
