  We discuss how the intensity and the energy frontiers provide complementary
constraints within a minimal model of neutrino mass involving just one new
field beyond the Standard Model at accessible energy, namely a doubly charged
scalar $S^{++}$ and its antiparticle $S^{--}$. In particular we focus on the
complementarity between high-energy LHC searches and low-energy probes such as
lepton flavor violation. Our setting is a prime example of how high- and
low-energy physics can cross-fertilize each other.
