Although it always belonged to Mexico, in 1852, California became part of the United States. Their new owners coveted their riches and some did not hesitate to use violence to obtain them. César de Echague (José Coronado), the son of a Spanish nobleman, is asked by his father to put order in the face of the threat of being dispossessed of his lands, but it will be an enigmatic masked man who confronts the unscrupulous and corrupt military.