When enigmatic freshman Amanda Valentino arrived at Endeavor High, she chose three people - Callie, Hal, and Nia - to guide her through the choppy waters of her new school. Except she didn't tell them about each other. When Amanda leaves, the three must reluctantly work together to figure out why. But once they start piecing together the cryptic clues that Amanda herself is leaving for them, they realize that everything they thought they knew about her is false. The more they dig, the mystery of where - and who - Amanda is deepens.

Hal was completely entranced by Amanda from the moment she set foot in Endeavor, and she shook his world view to its core, re-coloring the way he looked at everything. The guides continue to make surprising discoveries as they sleuth into recent alarming developments at school, Amanda's true identity, and her reasons for coming to Orion. They come to realize that Amanda may have disappeared physically, but she is definitely still sending beacons and clues so that they can uncover the larger mystery of which she is a part . . . does an intricate, carved box belonging to Amanda hold the key to everything?