Retired forensics expert Enzo MacLeod, half-Scottish and half-Italian, trades his Toulouse professorship for a daring wager: solve six long-cold mysteries. As he pieces together forgotten clues, he risks everything to prove the power of forensic science.

When a desperate stranger vanishes inside a Paris church, Enzo's hunt leads him deep into the City of Light’s catacombs. Each new discovery draws him closer to a ruthless killer—and closer to becoming the next victim.

Combining methodical investigation with pulse-pounding suspense, this thriller immerses readers in vivid French locales and intricate crime solving.

• Complex cold cases spanning France and Scotland
• Detailed forensic techniques and analysis
• Atmospheric chase through Paris catacombs
• A protagonist balancing intellect and personal stakes

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