In the outskirts of Paris, a disoriented young woman named Élisabeth is found wandering, unable to remember her own identity or the circumstances that brought her into this state of amnesia. She is taken to a mysterious, high-tech hospital secluded deep in the countryside, a clinical facility dedicated to the treatment of individuals with similar conditions. The sterile and oppressive environment of the institution seems designed more for containment than for healing. Élisabeth soon befriends another patient, Véronique, who, despite also suffering from memory loss, reveals chilling fragments about the purpose of their captivity.

As Élisabeth's fragmented memories slowly begin to resurface, she uncovers a sinister reality behind the hospital's façade. Patients at the facility are not merely treated for amnesia but are victims of a much darker conspiracy. The two women, bound by confusion and fear, seek to unravel the enigmatic situation they find themselves in. With time of the essence, as their memories continue to deteriorate, they must piece together the clues of their past in a desperate attempt to understand the truth about the institution and plot their escape before their identities and the essence of who they are fade away completely.