Based in real experiences. In 2003, the director of the film met a few people whom less than a year later were accused of killing about 200 people by blowing up trains. The place where the director met the accused, which was used for them to have private meetings, never have been named, neither in the court nor in the mass media. At that time, the director, phoned the number given for the authority to research any information but he never was called back. Despite 13 years have passed since the attack there are still suspicious things about the real authorship.