Simón is an aspiring novelist who makes a living designing crossword puzzles for a newspaper. One day he receives a threatening message instructing him to include the word "adversary" in a puzzle as Seville gets hit by a series of violent attacks.
| Directing | Mateo Gil | Director |
| Writing | Mateo Gil | Writer |
| Production | Antonio P. Pérez | Executive Producer |
| Editing | Nacho Ruiz Capillas | Editor |
| Production | Thierry Forte | Associate Producer |
| Art | Víctor Molero | Set Decoration |
| Directing | Anne Deluz | Assistant Director |
| Sound | Alejandro Amenábar | Original Music Composer |
| Camera | Javier Salmones | Director of Photography |
| Writing | Juan Bonilla | Novel |
| Production | Arancha Solís | Producer's Assistant |
| Production | Gustavo Ferrada | Executive Producer |
| Production | Enrique López Lavigne | Associate Producer |
