Olivier, a carpenter by trade who teaches at a trades training center, knowingly takes on Francis Thorion, the murderer of his son, as an apprentice. Francis is unaware of his connection with Olivier from five years ago. Olivier, tormented by the loss of his son and his separation from his wife, develops a slight obsession with Francis. He stalks him home, steals his keys and explores his apartment, whilst slowly discovering more about the boy. Francis looks up to Olivier, seeing him as a surrogate role-model. With this on his mind, Olivier is ultimately torn between hatred for the murderer of his son and the moral ambiguity of accepting this child from a broken home and disillusioned past.