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.
Paula, 40, must return to work after maternity leave but feels overwhelmed. She hires Tess as an au pair who seems perfect. As strange incidents multiply, Paula suspects Tess has dark intentions, but no one believes her warnings.
