The book starts off with a new arrival to the school, Nat, who had been found in a cellar, crying for his dead father and for his violin. Nat was a street Violinist, forced to bring money to a mean master every day, and got beat up every time he did not bring enough money. Nat was found by a friend of Jo [also known as Mrs. Bhaer], who had sent him to the school. Nat soon got comfortable with the kids and tried to do his best.
Nat later was allowed to handle a violin, and he did it so well, that many of the smaller kids instantly took to him. One of those kids was a twin sister of a boy named Demi-John (Demi) named Daisy. Daisy loved to sit at Nat's door while was was playing the violin. Nat was also invited to become part of the band they had made.
But Nat had his faults too. One of his major faults was to lie. Mr. Bhaer gave made the punishment that if he lied again he would have to whip Mr. Bhaer across the hand. Now the lad's affection for Mr. Bhaer was greater than for himself, so he lied no more for a long time. Now when Emil, who was growing corn, saw that his corn was smashed, he blamed Nat with a big temper, and Nat was so afraid that he lied to say that he did not. Now another boy named Tommy saw Nat run across the corn field, so he told Mr and Mrs. Bhaer. Nat confessed it all later to Mr. Bhaer but still got his punishment. Later, he was forced to do the punishment he had to do. Therefore, Nat stopped lying.
The book, "Little Men" by Louisa May Alcott is a very interesting book, and I recommend both this and the former book in the series (Little Woman) to people of all ages (although I think it is more suited to younger people).