Shu Fen (Rainie Yang) has been neglecting her 15 year-old daughter Ya Ting LEE. After finding out her daughter is pregnant, she asks her to have an abortion, and they have a huge fight. One day Ya Ting went missing and Mei Hua LIN the medium of Tiger God believes that Ya Ting was taken by the evil spirits to the mountains. Shu Fen organizes a search party to look for her in the mountains together with Jun Kai. Jun Kai finds the unconscious Yi Jun (Wei Ning HSU) in an abandoned mountain hospital. To find her daughter, Shu Fen lets Yi Jun stays at with her only to find more and more bizarre details all connected to the little red dress girl. The three of them decide to go to the mountains together but facing the threats of immense supernatural power, can Shu Fen find her daughter? And can all of them come back together?