After a complicated divorce, Gabriel rents a remote house to live by himself. In one of the rooms he finds a strange box which contains different objects, each of which relates to an unresolved crime. Finding the connection between the victims and working out who the killer is become his obsession.
| Writing | Rodrigo Sopeña | Writer |
| Writing | Ángel Agudo | Writer |
| Writing | Diego Arjona | Writer |
| Directing | Diego Arjona | Director |