The Enchanted Princess (1940)

Original title: Die verzauberte Prinzessin

Assad, a young Turk, meets a boy who tells him about a princess who was enchanted by an evil sorcerer. In a jeweler’s shop, the young man finds a precious ring in which he sees the princess who is imprisoned in it. He takes the ring and from now on is hunted by the authorities for his crime. But he has fallen in love with the princess and wants to free her from her prison, but doesn't know how to break the spell. Only the princess knows the secret, but she's not allowed to tell.