As Christmas approaches, Judith and Jeremy arrange for the group to attend a murder-mystery night at a hotel with a spooky history. But when an actual murder takes place, a heavy rainstorm traps Jean inside with all the suspects.
When a member of a marine exploration group suffers a cardiac arrest while searching the seabed, Caron enlists Jean's help to investigate whether the team of scientists were really combing for minerals-or looking for buried treasure.
A lifeless body, in possession of a rare diamond-encrusted cufflink, is found with a fencing foil protruding from his chest: a murder that relates to the last-ever duel in Sainte Victoire.
When an innocent nanny employed by a single father is shot at the bus stop across the road from La Couronne, a Dickens first edition and threatening letters feed into the tragedy.
After designer Violet Oliver has a near-fatal fall from a balcony during a fashion show, Jean approaches two suspects. But Violet's attempted murder is just the tip of the iceberg.
Judith's friend Nancy is shockingly kidnapped at Judith's surprise birthday party. Soon a photo arrives of Nancy bound with tape, a menacing knife pressed against her neck.
Patrick tells Jean that 30 years ago he was responsibile for identifying Sonny, a man sentenced to 30 years in prison. Can Jean solve a mystery before Sonny returns to take revenge?