Alerted by an intern, Savigny and Revel investigate three strange deaths. Suspecting at first an "angel of death", the investigators review their copies when they discover that it is about a traffic of capsules. They seek to corner the criminal by all means to avoid a cataclysm in the French public health system ...

A renowned obstetrician, whose practices do not appeal to a religious organization, is shot dead in front of his family. The investigators then orient themselves on the trail of a killer who attacks exclusively doctors performing abortion. They are far from imagining that this assassination hides a vendetta towards those whom the killer considers responsible for the death of his son, 6 years ago ...