Chloe and Tasha are ready for a break. After solving their biggest case ever, the owners of The Micah Road Detective Agency would love to relax for a while. Instead, someone called The Agent start leaving the girls clues - clues that seem to lead nowhere. Finally an unusual discovery propels the pair into a mystery complete with encoded messages, hidden doorways, concealed compartments, and one heavily guarded secret. Will the forces guarding the secret keep the girls from finding the truth or will the girls succeed in unraveling a mystery that will change their town forever?