‘Hugo Duchamp Investigates: The third trilogy’ contains the seventh, eighth, and ninth books in the series following Hugo Duchamp, a Frenchman living and working as a policeman in London who is about to have his world turned upside down. Fulfilling a promise, Hugo and his family journey to Moscow, Russia (Le Cri de Coeur) but soon find themselves in mortal danger when Hugo is called upon to assist the local police following the discovery of a mysterious box and its grisly contents. After a body is discovered on the grounds of the Chinese Embassy Hugo finds himself trapped inside with his family in danger on the outside. The clock is ticking and the killer has only just begun their deadly game. After fire tears through Montgenoux, Hugo and his team must deal with the shocking aftermath of the death of an entire family (La Famille Lacroix) (The Lacroix Family) and the fallout as racial tension erupts through the town. When the prime suspect is murdered, Hugo must put aside his own grief to unravel one of his most complicated and heartbreaking investigations. After decades away, Hugo returns to Paris (Les Mauvais Garçons) (The Bad Boys) after a request from the Minister of Justice, Jean Lenoir, following the death of a young man who apparently threw himself from the Eiffel Tower. Hugo soon finds himself face-to-face with his past as he tries to save the lives of a group of young people whose lives are in grave danger.