In Night Melody, the story opens with Marshall feeling a deep sense of unease as he prepares to execute a carefully plotted scheme against his wife, Melody. He makes a call to her sister, Helen, despite knowing the risks involved. Their conversation reveals the meticulous planning that has gone into this dark endeavor, with Helen assuring him that everything is in place for the evening's events. Marshall's anxiety is palpable as he contemplates the impending confrontation with Melody.