What is the mood of the open window?

The mood of "The Open Window" by Saki is initially light and airy, characterized by a sense of calm and tranquility as the characters engage in polite conversation. However, this mood shifts to one of tension and unease as the story unfolds, revealing a darker undertone through the unexpected twist at the end. The blend of humor and suspense creates an engaging atmosphere that keeps readers on edge until the conclusion. Overall, the story captures a juxtaposition of innocence and deception.