A barge is found drifting into a lock along a French canal, on board are discovered two corpses, a man and a woman, both hung. Inspite of an arrested suspect, the case resists resolution. Chief Inspector Magriet is called in from Paris to look for the solution. The inspector locates the local cafe, which proves to be the heart of the canal community, and settles in to drink some local wine, listen to everyone's story of events, observe the flow of life along the canels, order some more wine, and figures out the truth. This classic detective story is read by Professor Kitty, and hosted by Fortunato.