Sound Machine is a modern psychological drama that takes place in a world parallel to ours. Professor Henry Kleeblatt, a former biophysicist, trapped in a mental institution, believes that plants can talk. In order to prove that his theory is correct, he builds the Sound Machine, an instrument which can capture high pitched sound waves such as those of plants and converts them into sounds that the human ear can hear. His perseption and beliefs don’t coincide with popuar scientific views and thus Kleeblatt is ultimately persecuted for the action he has taken to support his ideas. Nurse Yolanda eventually sets up a meeting with Kleeblatt and the clinic’s doctors to give him a chance to prove his theory. As Kleeblatt works vigorously to complete his invention, various technical and emotional problems slowly drive him to the brink of insanity.