Penny Nichols Finds a Clue

A resourceful teenage daughter of a private investigator becomes personally drawn into her father's inquiry into a gang of automobile thieves after a series of thefts and threatening phone calls. She follows physical clues, studies identifying measurements and fragments from a sabotaged car, and begins sleuthing on her own as friends fall into danger. The investigation uncovers hidden evidence, a valuable photograph, and a concealed rendezvous at an old sawmill; a planned raid and revelations about the criminals bring the case to a decisive resolution and restore safety.