Young Inspector Hannah Richter is posted to Vaison-la-Romaine, an idyllic tourist town in Provence, as part of an exchange programme. This is a dream come true for her, as it allows Hannah to pursue her passion for Roman history alongside her work.
When a body is found in the Roman theatre in Orange, her expertise is called upon.
On the face of it, it appears to be a suicide, but Hannah discovers clues that point to murder. However, as her local colleagues, led by her superior Claude-Jean Bernard, dismiss her observations as mere fantasy, Hannah begins to investigate on her own.
And soon makes a gruesome discovery …