Antoine and Marine put their weekend getaway plans on hold when there’s a murder at the local university. The team question professors and students to distinguish professional jealousies from motives to kill, but the further they delve the more crimes they uncover.

Now working as a consultant for the police, Marine helps Antione and Hélène investigate the death of an aristocrat, found dead at his crumbling chateau. But just when they team think they’ve got their suspects nailed, another body is found.

A love affair seems to be at the heart of a young woman’s death in the nearby town of Éguilles, but is it connected to the discovery of an older woman’s body in a vineyard kilometers away? Antoine, Marine and Hélène investigate the men in the two women’s lives to discover what was done to them and why.