It is a detective story. 'No Clue! A Mystery Story' finds detective Jefferson Hastings at the home of wealthy but eccentric Arthur Sloane one hot summer night, when two other guests at Sloane hurst stumble across the body of young Mildred Brace lying dead on the lawn. Sloane’s daughter Lucille asks Hastings to help solve the crime, but Hastings gets surprisingly little help from anybody he interviews, including Mr. Sloane himself and even the mother of the victim. With few clues to aid him and nobody beyond suspicion, including himself, seemingly rock solid alibis begin to fall apart, expanding the list of potential suspects, and Hastings must rely on subtle expressions and the scant evidence at hand to try to solve the murder.