106 min Concert pianist Henry Orient (Peter Sellers) is trying to have an affair with a married woman, Stella Dunnworthy (Paula Prentiss), while two teenage private-school girls, Valerie Boyd (Tippy Walker) and Marian Gilbert (Merrie Spaeth), stalk him and write their fantasies about him in a diary. Orient's paranoia leads him to believe that the two girls, who seem to pop up everywhere he goes, are spies sent by the husband of his would-be mistress. When Val's mother, Isabel Boyd (Angela Lansbury), finds their diary, she suspects that Henry has acted inappropriately with her daughter.