A lecturer in the Department of Criminal Justice, Rusin is preparing his professional return to operational work as head of the fledgling Serial Crimes Unit. He has to choose people for his team from among four of his students - Raya, Chris, Philip and Mina. The psychologist and his ex-wife Zhanna and his close friend and crime journalist Leo help him in his selection. Russin gathers the finalists in a seedy place he calls the Freezer—a workspace where he will provide them with old cases with changed names and circumstances. What no one expects is the return of a serial killer that will completely change the course of events and everyone's lives.