Devout Christians Töre and Märeta send their only daughter, the virginal Karin, and their foster daughter, the unrepentant Ingeri, to deliver candles to a distant church. On their way through the woods, the girls encounter a group of savage goat herders who brutally rape and murder Karin as Ingeri remains hidden. When the killers unwittingly seek refuge in the farmhouse of Töre and Märeta, Töre plots a fitting revenge.
Karin hopes to recover from her recent stay at a mental hospital by spending the summer at her family's cottage on a tiny island. Her husband, Martin, cares for her but is frustrated by her physical withdrawal. Her younger brother, Minus, is confused by Karin's vulnerability and his own budding sexuality. Their father, David, cannot overcome his haughty remoteness. Beset by visions, Karin descends further into madness.
The devil has a stye in his eye, caused by the purity of a vicar's daughter. To get rid of it, he sends Don Juan up from hell to seduce the 20 year old Britt-Marie and to rob her of her virginity and her belief in love. She however can resist him and things get even turned around when Don Juan falls in love with her. The fact that he feels love for the first time now, makes him even less attractive to her and Don Juan returns to hell.
