Ten years ago, disaster struck the remote town of Indigo Falls. A horrific event drove the residents underground, into shelters that keep them safe from the danger on the surface. No one speaks about what happened that fateful day, but even the youngest still remember the fear and, most of all, the searing pain when sunlight touched their skin. Now, a handful of families inhabit this bunker together, guided by a charismatic leader named Dr. Imogen Moran. There are many rules Dr. Moran has instilled to govern life belowground. You must always tell the truth. You must avoid the light of the sun. You must never touch skin to skin. But the most important rule, the one that was drilled into their heads from the moment the hatch slammed shut all those years ago, was at the very end of the list. It rattled around in their skulls when all was silent, echoing in the quiet, lonely dark. You must never go outside.

The ratings are real. One number, 0 to 100, determines your place in society. Earn a high rating, and the world is yours for the taking. But fall to zero, and you may as well cease to exist. Societies thrive on order, and the Rating System is the ultimate symbol of organized social mobility. The higher it soars, the more valued you are. The lower it plummets, the harder you must work to improve yourself. For the students at the prestigious Maplethorpe Academy, every single thing they do is reflected in their ratings, updated daily and available for all to see. But when an act of vandalism sullies the front doors of the school, it sets off a chain reaction that will shake the lives of six special students -- and the world beyond.

Two teen vigilantes set off on an action-packed investigation to expose corruption and deliver justice in this YA historical fiction novel inspired by real seventeenth century Latinx teenagers.