The story takes place in Spain in the 17th century. Alatriste (Viggo Mortensen) is a nationally renowned army captain and guardian of Balboa (Eunax Unax Ugalde). Ala Triesd hopes to make Balboa a real man as powerful as he is, but Balboa falls in love with a dangerous woman named Angelica (Elena Anaya Elena Anaya), which worries him because Angelica's father, Louis (Jes ú s Castej ó n), once had a feud with him. Entrusted by Frey (Blanca Portillo Blanca Portillo), the head of the Inquisition, Atrarister and Louis undergo a dangerous assassination mission. However, in the course of his mission, Alatriste was impressed by the noble spirit of the assassination target and let them go, which also brought trouble to himself.