El Hada de los Dientes: Taladro Para Matar

After the events of a horrific school trip where students and teachers were brutally murdered, Sammy, a surviving teacher, reunites with her colleagues at work. However, after hearing some strange noises around the classrooms, Sammy feels that she is being watched. It is not until she hears the familiar knocks on the door that she realizes that her nightmare is not over.