  We investigate the magnetic activity of the G dwarf primary star in the
multiple system V815 Herculis. Recently, TESS Sector 26 data have revealed that
V815 Her is in fact a four-star system consisting of two close binaries in a
long-period orbit. We give preliminary orbital solution for the long-known but
unseen "third body" V815 Her `B', which is itself a close eclipsing binary of
two M dwarfs. Long-term spot activity of the G dwarf is presented along with
the very first Doppler image reconstructions of its spotted surface.
