Evelyn Prentice is the respected wife of a high-profile New York attorney. Despite the prestige and status she enjoys, she feels neglected and out of boredom becomes involved with an unscrupulous womanizing poet, who gives her the attention she craves. She eventually finds herself a victim of blackmail and becomes involved in his murder. When another woman is accused of the crime, she begs her husband to defend her.
After discovering a set of cryptic microcassettes in her new home, Cas is drawn into a meditative mystery of environmental sound and experimental music.