Claire Poussin, a young woman in her early 30s whose mother has recently died from Alzheimer's, has been having memory loss problems since being struck by lightning.

She believes she is showing the first signs of the disease, but her sister Nathalie thinks the problem is temporary.

Claire seeks help by entering a clinic for people with memory-loss problems, which is located in a big country house and run by Prof. Christian Licht.

At the clinic, Claire meets Philippe, a noted wine expert who is traumatized following a car accident which killed his wife and child, and they fall in love.

Philippe recovers his memory, and is pained when he remembers the tragic accident, while Claire's condition becomes worse.