The story Wendy tells about her experiences with the mysterious voice in the bathroom contributes to the plot by adding suspense and intrigue to the narrative. It raises questions about the supernatural elements at play within the story and adds an element of danger and uncertainty for the characters. Additionally, Wendy's story foreshadows future events and helps build tension as the plot progresses. Overall, her story helps to deepen the mystery and suspense of the story, keeping readers engaged and interested in finding out what will happen next.
