Stream The Secret Online Free – Watch Full Movie from Home at 123Movies. . Lucia (Natassja Kinski) is a volatile, exciteable young woman. She forms a romance with Carlo (Stefano Dionisi), who is somewhat callow and is very skittish. Their romance is not an easy one, but they are assisted in coping with its ups and downs by their mutual friendship with Franco (Franco Citti), an older, wiser and more stable man.