One of the most enervating yet incisive treatises on human relationships committed to celluloid, Knife in the Water explores the slow-burning uneasy tension that occurs in a simple setting: A bourgeoisie married couple pick up an obliquely menacing hitchhiker and invite him to join them on their sailing sojourn. What follows is an exploration of the inherently violent (psychological and otherwise) interpersonal power struggles at the heart of much human interaction.  A deceptively genial free jazz score masks an unsettling mood as themes of wealth, privilege, power, isolation, symbolism, claustrophobia, paranoia, jealousy, class, gender and generational struggles all collide in a nihilistic universe broiling under the punishing, sweating sun. In Polish with English subtitles.