Juliette is a former police officer who has become a nun under the name of Sister Thérèse. Her former companion, the lieutenant of police Gérard Bonaventure, often appeals to her to help her solve criminal matters, which she accepts, supported by the Mother Superior, ferue of police novels. He is usually assisted by Gabriel, whose every visit to the convent is an opportunity to see Sister Clemence and, after her departure to Africa, Sister Florence. After Gabriel's departure, Gérard has a new intern, Brice, who cracks Sister Suzanne. Lucie, the companion of Bonaventure, disapproves of Juliette's incursions into her life. The nuns also have to face a real owner who wants to get his land back, Mr. Roche. To pay rents, they make hand-made duvets, which they sell on www.soeurtherese.com.