Victor Hugo's Novel 1860

In Victor Hugo’s 1860s novel, a man is arrested for stealing a loaf of bread. He spends 20 years in jail, gets out and remakes himself as a new man and a town mayor. He rescues the child of a poor woman and raises her. A police detective cannot see that he is changed and haunts the man, but when they encounter each other during the French Revolution, the former thief lets the detective go with his life.