Famed stage actress Elisabeth Vogler (Liv Ullmann) suffers a moment of blankness during a performance and the next day lapses into total silence. Advised by her doctor to take time off to recover from what appears to be an emotional breakdown, Elisabeth goes to a beach house on the Baltic Sea with only Anna (Bibi Andersson), a nurse, as company. Over the next several weeks, as Anna struggles to reach her mute patient, the two women find themselves experiencing a strange emotional convergence.