Les Mystères des grottes du Régulus Trailer (2025)

06 July 2025 Crime, Mystery, TV Movie

A murder case rocks a small town when Julien Monnier is found dead, stabbed near the cave dwellings known as "Les grottes du Régulus." An old book is found beside him. Grace, a police captain, is put in charge of the investigation and discovers similarities with a ten-year-old case: a 17-year-old girl, Sarah, had been found dead, also stabbed, in the same caves. Grâce calls on Alex, her childhood friend who has become an expert in old books. He had investigated Sarah's death when he was a police officer. Alex reluctantly revisits the past and agrees to help, partly to reconnect with Grâce, his lost love. Their reunion rekindles old feelings and painful memories linked to their separation. As the investigation progresses, the memories of the protagonists and suspects become intertwined. Grace and Alex relive their past, but are confronted with conflicting memories and unspoken words.

Watch the official Les Mystères des grottes du Régulus 2025 trailer in HD below.

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Cast

Shemss Audat as Grâce Talbi

Antoine Hamel as Alex Mercier

Philippe Caroit as Jean-Marc Monnier

Sophie Accard as Sybille

Benjamin Gaitet as Julien Monnier

Amanda Lamb as Sarah

Gaëlle Battut as Elise

Amélie Prévot as Camille Vimon

Martine Gautier as Huguette

Céline Perra as Sylvia Pinter

Crew

Lorenzo Gabriele Screenplay

Philippe Lardon Director of Photography

Lorie Pester Director

Sylvette Frydman Producer

International Releases Dates

Belgium 30 September 2025

Switzerland 12 September 2025

France 02 May 2026

Production Companies

RTBF

France Télévisions

AT-Production

Flach Film Production

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