The Incredible Truth 2013

An artist named Jiajia promised to show her girl friend Wei Ling around in Japan but eventually fails to show up for no reason. After Wei Ling goes and gets accommodated in a family-run hot spring hotel of Shimizu, Jiajia's Japanese boyfriend, she begins her endless weird experience as if she's haunted, and the hotel even sinks into a series of horrible homicides, in which the victims are all family members of the Shimizu's without exception. Every clue found is connected to Jiajia. The survived Shimizu's servant Tadao grasps Wei Ling to entice the murderer. But whether Jiajia is dead or alive along with the identity of murder remains a secret until the very end of the story.