The Goose-Girl at the Well

Can your life change when you give a helping hand? You can never know before you do it, right? Without expecting anything, a rich count offered help to an old lady carrying a heavy burden. The gift he got in return was a box with a pearl inside. Now what if we tell you that this pearl belonged to the king's long gone daughter? How can the mystery be solved and will this story have a happy ending for all?