The Heart Bandit.

A kindly old woman named Mrs. Rand takes in wayward girl and petty crook Molly O'Hara, known as "Angel Face" to her gang. Mrs. Rand eventually gets Molly to see the error of her ways and she reforms. However, it her son John that has strayed from the straight and narrow and is part of a big money bunco. It's Molly's turn to help out the old woman, by reforming John as he falls in love with her.