Play this for anyone wedded to that nasty Ricky Gervais gag about awards raining down on anyone playing a mental. Harriet Andersson is the best thing in this, although I wouldn't choose to follow the director in his notes where he claimed the other actors (and himself) all fell short of what was needed.
A family of four (father, son, daughter, son-in-law) are seen on a happy vacation which swiftly fractures as the daughter's mental instability dominates the attention of the woeful males, none of whom can help her despite their contrasting attempts to offer support. Her visions and mania offer the opportunity for an exploration of faith and an attempt to comprehend the nature of God. How does one live alongside mental illness (schizophrenia apparently)? This serious subject is awarded the most beautiful b/w cinematography, sensitive performances, and some hope at the end with the father/son reconciliation. There is a warmth and intimacy to balance the guilt and despair.
I'd say this is a fascinating study from the great b/w days of Bergman, way easier to watch than the nightmarish scream-fest Cries & Whispers (also starring Andersson). Interesting notes provided by Philip Strick and also Ingmar Bergman, scene-access and so forth.