A drunk captain falls into the water near his ship and causes a commotion, allowing them to save a man who had recently been stabbed and thrown into the water.
This isn’t an ordinary person, but a thriving businessman—the shipowner Ducroix. His rescue will kick off a series of deaths that Commissioner Maigret will have to untangle, establishing the true picture with all cause-and-effect links.
For Maigret, this is his last case as commissioner of the criminal police. He has only a few days left before retirement, but that doesn’t stop him from putting in every effort to understand Ducroix’s psychology—the key element for Maigret in this case.