Stanislas Oscar Seminario, aka SOS, is a young explorer, just back from Africa, visiting old friends: the Pescara’s. But the father keeps receiving anonymous letters. And soon a mysterious murder…

Inhabitants of a flophouse struggle to survive under the harsh treatment imposed by the landlord, Kostyleva. One resident, young thief Wasska Pepel, ends his affair with the landlord’s wife, Vassilissa,…