Based on the bestselling French novel by Jean-Christophe Grangé, the story begins with the discovery of the body of a man wearing a bull's head at the Saint-Jean train station in Bordeaux - the first in a series of murders inspired by Greek mythology. Police captain Anaïs Chatelet (Raphaëlle Agogué) teams up with psychiatrist Mathias Freire (Anglade) to catch the killer, but as the investigation proceeds each discovers dark personal secrets about the other. A person may be the sum of their memories – but what if those memories are not their own?
The twists come at a furious pace throughout six nerve-shattering episodes; identities and perspectives constantly shifting as our protagonists (or are they antagonists?) travel through some of France's most picturesque regions, from Bordeaux to Marseille to Paris, racing against time to solve the mystery of the "mythological killer" and uncover his (or her?) fiendish endgame. In addition to the mythological aspects, the show also encompasses themes of art, memory, psychology - and speed dating!