"YOUNG CAPTAIN JACK" relates the adventures of a boy waif, who is cast upon the Atlantic shore of one of our Southern States and taken into one of the leading families of the locality. The youth grows up as a member of the family, knowing little or nothing of his past. This is at the time of the Civil War, when the locality is in constant agitation, fearing that a battle will be fought in the immediate vicinity. During this time there appears upon the scene a Confederate surgeon who, for reasons of his own, claims Jack as his son. The youth has had trouble with this man and despises him. He cannot make himself believe that the surgeon is his parent and he refuses to leave his foster mother, who thinks the world of him. Many complications arise, but in the end the truth concerning the youth's identity is uncovered, and all ends happily for the young son of a soldier.