In Bangkok, the medical student Mai has her first contact with cadavers in the anatomy class; however, after touching the dead body, she is haunted by the ghost of a woman. The dean Professor Winai advises her to follow another career, but her Professor Prakit offers to help Mai to supersede her fears and beliefs. When Mai sees the picture of Ning Priatyda, the girlfriend of her former boyfriend Tos, she recognizes the ghost and decides to investigate Ning, discovering that the young woman is missing. Later she finds that her tenant Noi has seen the ghost of Ning many times at her house. When the security guard Swai calls Mai, she discovers a dark secret about the fate of Tos and Ning.