Туннель (2014)

The dismembered body of a hooker is found, and police arrest her pimp and his crew for the crime. During interrogation, they explain how the girl stole from her pimp, and so they group kidnapped, raped, tortured, and finally murdered and dismembered her.

To bring back her dead friends, high school student Naomi (Rina Ikoma) goes back to the elementary school where a tragedy took place. She becomes involved in a new incident.

At a prep school, a secret horror begins to unfold as the students begin to die.