Poquelin and De Beaumont investigate when the owner of the largest canning factory in Dunkirk is found murdered.

Poquelin and de Beaumont are sent to a boarding school after the suicide of one of the French teachers.

Poquelin and de Beaumont investigate a crime in the literary community.

Poquelin and de Beaumont investigate a death that occurred following an action by vegan activists on a cattle farm.