Father Fanourios unexpectedly visits the monastery with the aim of finding out the reason why the abbess and Arsinoe have gone out of the way of the Lord. At the same time, the dark past of one of the nuns, comes to light and shocks the others. Following Karaiskos, Sofianos and Tsakalakis, they arrive at the trail of a new suspect who could be Petros' killer. A little later, the monastery of Agia Theodouli becomes the target of a murderous attack that endangers the lives of the monks.