Hired by thirteen-year-old Scott Lamont, private eye R.A. Huber is faced with the task of solving a mystery in retrospect. The boy is convinced that the cause of his parents' death in a plane crash four years earlier was not an accident but in fact murder. Backtracking, the case takes Huber from Los Angeles to Lake Tahoe, California, and to the Central Mexico region. After another homicide, the lady sleuth knows that her young client's suspicion is on target.