 Christopher, a non-Jewish Irishman who had been interred at Drancy by mistake, now works as an entomologist in Paris.The three are reunited at a farm in the Eastern Townships of Quebec, where Melanie and David live with their grown son, Benjamin (Dupuis), a gourmet cook, who prepares a "life-changing" meal served outside, at a table set up under a tree.The film's title highlights the complex "emotional arithmetic" of bitterness, jealousy, and love exposed as the characters confront the past, reconcile their feelings about one another, and struggle to move on.