The peaceful existence of three eccentric, secluded nuns living in a remote island monastery is shattered when a priest unwittingly happens upon them.

As Frankie launches a search for her missing brother, the nuns give Ignatius an ultimatum: wed himself to their order or face certain death. Margarita continues to struggle with the demons of her past.

A lifetime of lies causes a divide between Carla and her sisters; Iphigenia is forced to deal with her past in order to face her future.

As a memorial is held for Ignatius on the mainland, Iphigenia's loyalty is tested when she considers a deal with the devil to save the monastery. Margarita's past threatens to destroy them all.