Candleshoe (1977)

When ex-con artist Harry claims that a secret treasure is hidden inside Candleshoe, an English estate, he creates an elaborate plan to find and steal the prize. By convincing a girl named Casey to impersonate the estate owner’s long-lost granddaughter, Harry hopes to uncover the treasure’s location. But when Casey has a change of heart, she must follow the clues and find the treasure, in order to save Candleshoe and stop Harry before it is too late.
Norman Tokar
David Niven, Jodie Foster, Helen Hayes, Leo McKern, Veronica Quilligan, Ian Sharrock, Sarah Tamakuni, David Samuels, John Alderson, Vivian Pickles, Mildred Shay, Michael Balfour, Sydney Bromley, Eddie Powell
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