 The original series followed the adventures of Francisco Guerrero, a social worker living in Edinburg, Texas and grandson to the original El Gato Negro, who adopted his grandfather's former nom de guerre in order to avenge the death of his best friend.The series also introduced Agustin Guerrero, the original El Gato Negro of the early '50s and late '60s, as a major supporting character.Although the character officially retired from his former vigilante-activities, Agustin did appear in costume at the climax of the first story-arc entitled, ""Unknown passing, Unforgettable Return"" ("El Gato Negro" #1-3).