The first teen detective!
Mary Louise Burrows has been a privileged child, doted over by her mother and her "Gran'pa Jim", otherwise known as Col. Hathaway. When the two suddenly disappear, she is shattered to discoversthat her beloved grandfather is a wanted man, facing a charge of treason, something she knows he is not capable of.
Mary Louise sets off on a quest to unravel this mystery. Watched by secret agents who seek to find the old man through her, Mary Louise must find her way through a cloud of suspicion. She tries to find her mother and grandfather without betraying them to the law officers that pursue them. In time she strikes up a friendship with a Secret Service agent named O'Gorman, who seems genuinely sympathetic to her family's plight. With the help of his daughter Josie, O'Gorman (a fixture in the series) will she be able to prove the Colonel's innocence and bring together her family again?