Abby Patterson thought her antique desk was a treasure. Little did she know that the real treasure lay in the secrets it contained. The Delaware Detectives are back with another exciting adventure. Trouble is brewing in the city of Dunn, and Abby and Jamie take it upon themselves to get to the bottom of it. Joining forces with their friends, Scott and Phyllis, and their faithful canine companion, Watson, the group use their sleuthing skills to uncover dirty secrets, hidden treasure and another mystery. But this one has a time limit, and the clock is ticking!