1. The Search

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.

2. Family Secrets

Letizia Ruggeri recommits to the long-shot DNA-driven investigation into the headline-grabbing case of Yara's murder. Investigators descend on nearby mountain villages, questioning locals and collecting DNA samples. When geneticists examine the of DNA of deceased bus driver Giuseppe Guerinoni, they uncover old family secrets that may hold the key to bringing the killer to justice.

4. The Trial

A year long court-case ensues, and the fraught proceedings fuel national debate about Bossetti's culpability. New evidence and suspicions emerge, and what started out as an ironclad case for the prosecution begins to bend towards the defence. The case reaches new levels of speculation and scrutiny, as those involved prepare to learn who, if anyone, will be held responsible.