Nancy Drew's keen mind is tested when she searches for a missing will. After aiding an injured child, Nancy accidentally stumbles upon the mystery of Josiah Crowley's missing will. While several of Crowley's impoverished relatives claim that he had included them in his will, his arrogant relatives, seem to possess the only copy, which leaves them in total possession of the deceased man's fortune. Nancy is intrigued by the situation and begins searching for Crowley's missing antique clock, an object that reportedly contains a clue to the will's location. During her investigation, she encounters a series of obstacles, one of which is the theft of the clock by thieves. Nancy's resuce of the clock ultimately leads to her discovery of the real will.