Doi Nang Non, also known as the Sleeping Lady mountain, is situated on the border between Thailand and Myanmar. Beneath this mountain range lies the Tham Luang Nang Non cave system, which is a complex network of caves. Twelve boys aged 11 to 16, who were members of a local football team, along with their 25-year-old assistant coach, decided to explore the cave. Unfortunately, as they ventured deeper inside, the early monsoon rains began to fill the cave, trapping them inside.