Vaugand returns to work to help appeal the conviction of Dylan Thevenot, who proclaims his innocence. Did his mistress, Audrey Varennes, drive him to kill her husband? Has the young man been manipulated?
A young man is convicted of having poisoned his adoptive mother. Vaugand is convinced that the presiding judge made deliberate maneuvers to guide the deliberations.
Accused of murder, mentally-deficient Thierry Moncef is ruled irresponsible for his acts at trial. By agreeing to defend him, Vaugand knows that he's up against public opinion, angry that Moncef has walked free from his trial, but also the prosecutor's office and a rival out for his head.
