Judge Jeanne Charmant Killman (Isabelle Huppert) is assigned the job of investigating a high-profile case of corruption and embezzlement at a giant state-supported company. Under her orders the CEO Michel Humeau (Francois Berleand) is taken in to custody. As her investigation gathers momentum, Killman uncovers an immense scandal reaching into the upper echelons of government. The deeper she delves and the more she uncovers, the more powerful she becomes. However, under the pressures of her sudden influence and notoriety, Killman's private life begins to unravel, and she finds herself probing both the limits of her own power and its intoxicating grip.