

Les Mystères des grottes du Régulus
2025, French. Directed by Lorie Pester.
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.
- Runtime
- Unknown
- Post-credits
- None listed
- Language
- French
- Rated
- Check local
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Where to watch Les Mystères des grottes du Régulus
Les Mystères des grottes du Régulus isn’t streaming on any OTT platform in India yet; it released on 6 July 2025.
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Part of a series
Les Mystères: watch order
Cast & crew
- Lorie PesterDirector
- Shemss AudatGrâce Talbi
- Antoine HamelAlex Mercier
- Philippe CaroitJean-Marc Monnier
- Sophie AccardSybille
- Benjamin GaitetJulien Monnier
- Sacha VanbockestalThéodore
- Romane Raffin-DelysMorgane
- Amanda LambSarah
- Gaëlle BattutElise
- Orianne SchieleConstance
- Eric BougronPaul Vimon
- Amélie PrévotCamille Vimon
Details
- Released
- 6 July 2025
- Country
- France, Belgium
- Written by
- Lorenzo Gabriele
Check ratings elsewhere
News & fan talk
Watch before Les Mystères des grottes du Régulus
In release order. The films it follows, and anything it builds on.

Murders In Toulouse
2020 · 6.6/10
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Les Mystères de l'école de gendarmerie
2021 · 7.0/10
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The Mysteries of the Duchess
2022 · 7.0/10
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Les Mystères de la Marée
2023 · 6.1/10
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Le Vent des sables
2024 · 6.4/10
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Meurtres sur la Côte bleue
2024 · 6.0/10
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Meurtres à Meaux
2024 · 6.0/10
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The Mysterious Gaze of the Flamingo
2024 · 6.3/10
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Meurtres à Saint-Martin
2024
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Meurtres en Pays Catalan
2025 · 4.0/10
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After Les Mystères des grottes du Régulus
What comes next in the series.
If you liked Les Mystères des grottes du Régulus

Aurora Teagarden Mysteries: How to Con A Con
2021 · 7.2/10
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A Bone to Pick: An Aurora Teagarden Mystery
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Mystery 101: Dead Talk
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Les Mystères des grottes du Régulus: quick answers
What should I watch before Les Mystères des grottes du Régulus?
Watch Meurtres à Meaux (2024), The Mysterious Gaze of the Flamingo (2024), Meurtres à Saint-Martin (2024), and Meurtres en Pays Catalan (2025) first, plus 6 earlier titles listed on this page.
What comes after Les Mystères des grottes du Régulus?
Next in the series: Murder in Saint Didier.
Is Les Mystères des grottes du Régulus worth watching?
Les Mystères des grottes du Régulus doesn’t have enough ratings for a verdict yet.
Does Les Mystères des grottes du Régulus have a post-credits scene?
None is listed for Les Mystères des grottes du Régulus. Viewers tag these on TMDB, so a brand-new film may not be tagged yet.
Les Mystères des grottes du Régulus parents guide: is it suitable for kids?
No age rating is listed for Les Mystères des grottes du Régulus yet.
Which OTT platform is Les Mystères des grottes du Régulus on?
Les Mystères des grottes du Régulus isn’t streaming on any OTT platform in India yet; it released on 6 July 2025. (Checked 12 November 2026.)
What movies are like Les Mystères des grottes du Régulus?
If you liked Les Mystères des grottes du Régulus, try Aurora Teagarden Mysteries: How to Con A Con, Garage Sale Mystery, Mystery 101.
Who directed Les Mystères des grottes du Régulus?
Les Mystères des grottes du Régulus (2025) was directed by Lorie Pester and stars Shemss Audat, Antoine Hamel, Philippe Caroit.
