  The physics of bound states in the continuum (BICs) allows to design and
demonstrate optical resonant structures with large values of the quality factor
($Q$-factor) by employing dielectric structures with low losses. However, BIC
is a general wave phenomenon that should be observed in many systems, including
the metal-dielectric structures supporting plasmons where the resonances are
hindered by losses. Here we develop a comprehensive strategy to achieve
high-$Q$ resonances in plasmonic metasurfaces by effectively tailoring the
resonant modes from local and nonlocal regimes.
