Loudun, October 1947. Leon Besnard and Marie celebrate their eighteenth wedding anniversary with friends and Ady, a former German prisoner they have "adopted". A few days later, Leon dies. Louise, a friend of the couple's and probably Leon's mistress claims that, on his deathbed, the deceased told her that Marie was poisoning him. The whole town soon condemns Marie and she is arrested and sent to jail. Did she really kill Léon as well as twelve other members of her family as she finds herself charged with?
Unfortunately the movie The Poisoner is not yet available on HBO Max.
| Writing | Anne Giafferi | Writer |
| Directing | Christian Faure | Director |
| Production | Jean-Pierre Alessandrini | Producer |
| Production | Anne Leduc | Producer |
| Production | Olga Vincent | Producer |
| Production | Arlette Zylberberg | Producer |
| Sound | Charles Court | Original Music Composer |
| Sound | Carolin Petit | Original Music Composer |
| Camera | Willy Stassen | Director of Photography |
| Editing | Jean-Daniel Fernandez-Qundez | Editor |
| Production | Annick Dufrene | Casting |
| Art | Sébastien Birchler | Production Design |
| Costume & Make-Up | Sandrine Bernard | Costume Design |
| Costume & Make-Up | Jean-Christophe Roger | Makeup Artist |
| Costume & Make-Up | Nathalie Louichon | Makeup Artist |
| Costume & Make-Up | Laurence Azouvy | Makeup Artist |
| Sound | François Lepeuple | Sound |
| Writing | Olga Vincent | Writer |
| Writing | Daniel Riche | Writer |
