The River Po dominates the Italian region of Ferrara. It nourishes the close-knit fishing communities who live on its banks, and it also hides their secrets. Secrets that are sometimes uncovered by people like police inspector Franco Soneri. Almost as inscrutable as the river itself, he stands brooding at crime scenes chewing on a cigar, trying to see what others might be missing. In the ensuing investigations, he and his team often stumble upon old wounds left over from World War II, when differing political alliances turned neighbours into enemies. Passion for his job makes him Ferrara's best investigator but it also takes a toll on his relationship with the beautiful Ukrainian lawyer, Angela Cornelio.