The Book Agent (1917)

Harry Kelly, a bookseller, meets pretty young Mollie Lester at a women's seminary. He runs into her again sometime later when he finds her employed as nurse to the wealthy invalid Crandall Barker. What Barker doesn't know is that Mollie is the child of his daughter whom he had disinherited some years earlier. Barker takes to Harry, and hires him as a sort of jester to keep him amused. Then Harry learns of a plot by Barker's nephew, a reverend and a doctor to kidnap the old man and swindle him out of his money.