Su Yao, who lives in Bangkok's Chinatown, lost both her parents when she was young. She lives with her grandmother and helps out in a Chinese medicine shop. Recently, strange things have happened in Chinatown: residents have disappeared for no reason, and strange noises can be heard at night. On her way home, she was attacked by a mysterious man in black robes, but fortunately she was rescued. The man in black said that she was related to an ancient book and wanted to kill her to stop her plan. Su Yao remembered that she had picked up an ancient book while collecting herbs, so she started to study it. During the research, she was suspected by the Chinatown Security Team of being related to the strange things and was taken to the police station for interrogation.