Nora, 26, is a graduate and still lives with her parents. While Nora has no field experience, she finds herself in charge of a 19-year-old boy, accused of having murdered a girl from his residence. From her first police custody to the follow-up of the instruction, Nora discovers the cruelty of the world around her, in her intimate and professional life. Soon, carried away by the frenzy of her new life, she multiplies the errors.