Spain, 1939. In the last days of the Spanish Civil War, the young Carlos arrives at the Santa Lucía orphanage, where he will make friends and enemies as he follows the quiet footsteps of a mysterious presence eager for revenge.
| Writing | Guillermo del Toro | Screenplay |
| Sound | Javier Navarrete | Original Music Composer |
| Production | Sara Bilbatúa | Casting |
| Directing | Guillermo del Toro | Director |
| Camera | Guillermo Navarro | Director of Photography |
| Editing | Luis de la Madrid | Editor |
| Sound | Oriol Tarragó | Sound Editor |
| Sound | Salvador Mayolas | Sound Designer |
| Production | Bertha Navarro | Producer |
| Camera | Miguel Bracho | Still Photographer |
| Costume & Make-Up | Fermín Galán | Hair Designer |
| Costume & Make-Up | José Vico | Costume Designer |
| Production | Agustín Almodóvar | Producer |
| Production | Esther García | Production Director |
| Camera | Joaquín Manchado | Camera Operator |
| Directing | Pedro Manuel Lazaga | Assistant Director |
| Sound | Miguel Rejas | Sound Engineer |
| Art | César Macarrón | Production Design |
| Directing | Yuyi Beringola | Script Supervisor |
| Sound | Kiku Vidal | Foley Artist |
| Sound | Ray Gillon | Sound Mixer |
| Crew | Sergio Atanes | Stunt Coordinator |
| Crew | Reyes Abades | Special Effects Coordinator |
| Costume & Make-Up | Jorge Hernández Lobo | Makeup Designer |
| Writing | Carlos Giménez | Storyboard |
| Writing | Antonio Trashorras | Screenplay |
| Production | Michel Ruben | Associate Producer |
| Lighting | Enrique Bello | Gaffer |
| Writing | David Muñoz | Screenplay |
| Production | Rosa Bosch | Co-Producer |
