Elodie and Yvan settle for the first time in a house with a garden, in a new neighborhood. This is an important step, supposed to give new life to their couple and a better balance to their teenagers: Achille, a gifted boy and Chloé, a more fragile girl. Fortunately there is Bruno, the nice and considerate neighbor with each member of the family. A real pleasant surprise. But little by little Bruno reveals his dark side. Does his growing intimacy with Elodie and Chloé hide a desire to control this family, even destroy it? The day when Elodie begins a passionate relationship with Bruno, she does not know that she has put her finger in an infernal gear, from which no one will come out unscathed.