New York, 2011. A 15-year-old girl is discovered crucified in the suburbs, and investigative journalist Miren Triggs unexpectedly receives a strange envelope. Inside is a Polaroid photo of another teenage girl, bound and gagged. Below the picture is credited only "GINA PEBBLESOVÁ, 2002."

Miren Triggs and her former college teacher Jim Schmoer are searching for the footprints of the Polaroid girl and the crucified one. They penetrate the church school, an institution that hides many secrets.

To solve the greatest mystery, he must find the answers to three questions, which seem practically impossible: What happened to Gina? Who sent the polaroid? but most importantly: Are both stories connected?

Having sold more than a million copies of his books, Javier Castillo presents readers with an unsettling thriller that draws them into a game full of credulity and deception, love and pain, strange rituals and a dark secret that could turn everything upside down if revealed.