Thomas Schaffner, a brilliant lawyer who believes that everyone has the right to be defended, even the worst villain. Applying this principle, he pleads the cause of Follet, an assassin who brutally killed a young woman. He wins his case, Follet is released but Thomas refuses to shake his hand, too disgusted by his client's sadism... Annoyed, the latter decides to attack Thomas' wife... The beginning of a terrible gear... French remake of the BBC mini-series Perfect Crime (The Escape Artist).