The body of a homeless woman is found in a public park. The only way of identifying her is her signet ring, embossed with a coat of arms. Who was she? A case that will bring Margot and Arthur all the way to Indochina in the 1950s.
A female painter is murdered. She is found holding a birthday chain bracelet from the 19th century, a piece of jewelry also found in one of her canvases. Is she trying to point to her murderer?
Margot and Arthur are faced with an enigma. A man with amnesia and burns to his hands and face admits to murder and claims to have died 250 years ago. Every morning, he forgets what happened the day before. His only memory is a tune played on an unknown instrument.
The body of record dealer Jocelyn Gallois is found in a former US Army base. He's been shot in the head with a Colt 45, a weapon used by US troops in the 1960s, when the camp was still in operation.
Joseph Augereau's body is found on the edge of a forest. He died through blood loss, his leg caught in a wolf trap, an animal of which he was terrified. Because a curse lay on his family, who were said to be wolf prey.
A famous designer is found dead in a former chateau. Today a hotel, the building was once a brothel. The body was found in a secret hideaway. The victim was strangled and the autopsy reveals a child was born. A child not shown in the official records.
A 24-year-old man is found strangled. In his mouth is a disc featuring a four-leaf clover. This is in fact a gaming chip from the Villa Jaume, today a hotel but formerly a casino in the 1960s.