August 1936, the beginning of the Spanish Civil War. 51 members of the Claretian community of Barbastro (Huesca) are martyred, die for their faith. The film recounts the last weeks of his life, since they are held until they are finally shot. During that time, they perform various writings they talk about their situation, of his fellow captives, people who saw them. These writings have been the basic testimony used to narrate this real fact in film version.
| Directing | Pablo Moreno | Director |
| Costume & Make-Up | María Gómez Rodríguez | Makeup Designer |
| Directing | Anna Rodríguez | Second Assistant Director |
| Production | Paco Pavón | Production Manager |
| Writing | Juanjo Díaz Polo | Writer |
| Costume & Make-Up | Patricia Azpeleta | Costume Design |
| Camera | José María Vicente González | Assistant Camera |
| Costume & Make-Up | Cristina Martín | Hairstylist |
| Production | Noelia Amaro | Assistant Production Manager |
| Camera | Rubén D. Ortega | Camera Operator |
| Production | Jacobo Muñoz | Casting |
| Production | Raúl Carrillo | Assistant Production Manager |
| Production | Sandra Gumuzzio | Assistant Production Manager |
| Production | Bárbara Rodríguez | Casting |
| Directing | María Esparcia | Continuity |
| Sound | Sergio Cardoso | Music |
| Sound | Idoia Iñarritu | Sound |
| Production | Sergio Morán | Extras Casting |
| Production | Gonzalo Fernández | Assistant Production Manager |
| Sound | Roberto Alonso | Boom Operator |
| Editing | María Esparcia | Editor |
| Sound | Jofre Llivina | Sound |
| Crew | Rubén D. Ortega | Cinematography |
| Directing | Daniel «El Lobo» Blasco | Assistant Director |
| Art | Aránzazu Gaspar | Art Department Manager |