God, Cain, etc…

S2 E5: A new murder case brings Cain and Lucia to the Convent of the Annunciation. Apparently, one of the nuns has committed a suicide. It seems that the head of the Convent is not as pure and kind as one might think: the Mother Superior is extremely manipulative and abusive. However, Cain senses that the nuns are tormented by another, more complex and insidious secret...