Persona is difficult to characterize in simple terms, but it may be helpful to describe this complex film as being an exploration of identity that combines elements of drama, visual poetry, and modern psychology. The central story revolves around a young nurse named Alma (Bibi Andersson) and her patient, a well-known actress named Elisabet Vogler (Liv Ullmann). Elisabet has stopped speaking, and the attending psychiatrist treats the actress by sending her to an isolated seaside cottage under Alma's care. There the nurse, who must do all the talking for both women, becomes a little enamored of the actress. One evening Alma tells Elisabet about some exhilarating sexual experiences she once had and their unpleasant aftermath. Soon after sharing this confidence, the nurse reads a letter Elisabet has written and is shocked to learn that the actress thinks of her as an amusing study. The relationship between the women becomes tense, and they wound each other.
An English soldier (Cliver) returns home from the Zulu war with the daughter of a tribal king (Gemser) as his slave (a gift that he was given for "saving" the kings life). The spoils of war, ya know? While he's been gone, his wife has been having an affair with the female housekeeper (Belle). Not at all pleased with being a slave, the Ebony princess notices the mistress of the house engaging in a quick bit of foreplay with the housekeeper and plots her revenge starting with the seduction of the mistress. Jealousy spreads like wildfire and before you know it, she has turned the household into a lustful frenzy of sex and hatred. I can't give away too much more or it would ruin the story, but there are plenty of little twists along the way.