Lin Hsiao-yang tries to keep her family together while working as a waitress at Kentucky Fried Chicken and going to night school. With no mother and her father currently working out of town, it is up to Lin Hsiao-yang to take care of her younger siblings, who are slipping into a life of crime.
The film is based on the legend of the Lake Tianchi Monster in Changbai Mountains. It tells about the scientific expedition led by Zhong Wenshan in 1955 to look for the strange disappearance of the water monster. There is an underground river connected to another mysterious place under the water....