On the morning the corpse of a man has been found in a bathing tank of the sanctuary of Lourdes.The police captain Fiona Langlois will be in charge of the murder investigation with a help of Maxime Gardette, a police investigator who recently has come to Lourdes.The victim , the doctor Adrien Delubachas received a hit in his head and was drowned in a bathing tank.The doctor was member of the International Medical Committee of Lourdes , a group of doctor who investigate cases of healing by miracle.

Jacqueline and Richard, a couple in their eighties, return to the hotel where they spent their first night of love sixty-five years ago. In that same room, they rediscover memories of the past as they retrace their shared love life. Little by little, we understand the true purpose of this pilgrimage. Faced with the disease that relentlessly gains ground, they have decided not to leave each other and to leave together, with dignity.