This is the story of a mysterious and invisible visitor who came to Earth, bringing chaos and lessons in equal measure. Starting in Wuhan, China, in late 2019, this visitor spread across the globe, halting life as humans knew it. Businesses closed, families were confined to their homes, and fear filled the air. While it caused great suffering, it also gave people time to reflect, connect with loved ones, and appreciate the beauty of Earth. This visitor, representing the COVID-19 pandemic, reminds humanity of its vulnerability and the importance of cherishing life and nature. It left quietly but promised to return one day.