In a sleepy northern Italian town on November 26th, 2010, Yara Gambirasio disappears without a trace. In February, after a terrible winter of fruitless searching, her body is found, and the facts of her brutal killing are established. While all of Italy mourns her death, local D.A. Letizia Ruggeri begins searching for Yara's killer, known only as Unknown Male Number 1.