BTS
- বছর: 1970
- দেশ: Spain
- জেনার: Thriller, Mystery
- স্টুডিও:
- কীওয়ার্ড: behind the scenes, series of murders, locked door, arts school, school project, murder in school, locked inside
- পরিচালক: Igor Morales
- কাস্ট: Néstor Seller, Juan Paya, Lucía Agustín, Irene Hickey, Candela del Olmo, Álvaro Galarza Lima
