Allison Scott is 15 years old, only child and has the richest parents in the whole city. She has the perfect hair, wears the perfect clothes, has the perfect friends and leads the perfect life. Hannah Adams is also 15 years old and is less lucky. She lives in an apartment with her two younger brothers and mother and she has no idea who or where her dad is. Although these two girls live in the same city and go to the same school, they have never met each other. Due to this simple fact, they also have never noticed that they look exactly alike.

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?

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.