Context. It is well known that from 1645 to 1715 solar activity was notably low and the number of sunspots extremely reduced. This epoch as Maunder Minimum (MM). The study stars in prolonged minima like MM could help shed light on this enigmatic epoch. Aims. To explore if star $\zeta^{2}$ Ret, which belongs a binary system, state similar MM. We have collected more than 430 spectra acquired betw...