"Nang Nak" is a famous Thai ghost story that tells the tale of a woman named Nak who dies during childbirth while her husband, Mak, is away at war. After her death, she returns as a spirit to be with her husband and their newborn child, unaware of her own demise. The story is set in the village of Phra Khanong and explores themes of love, loss, and the supernatural. It has been adapted into various films, plays, and literature, making it a significant part of Thai folklore and culture.