Élodie and Yvan Marsais, her husband, settle for the first time in a house with a garden, in a new peaceful 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 good surprise, especially for Élodie and Chloé who immediately feel a special connection with him. Unfortunately, Yvan's pressure at work interferes with this new harmony and Chloe creates new problems. To make matters worse, Élodie suspects Yvan of wanting other women...
The suspicions weighing on Yvan refresh the atmosphere within the Marsais couple. At the same time, Bruno goes on a charm offensive. Chloe "goes into a spin". To appease her, Bruno offers to boost her in a talent contest, a prospect that divides her parents and in which Chloé puts all her hopes. Élodie, for her part, thinks she has discovered evidence of Yvan's infidelity, which multiplies the failures while trying to reassure his wife. Secretly, an observer seems to rejoice in the misadventures of the Marsais family. He takes advantage of Élodie's total disarray to take action.
Seriously injured, Bruno is questioned by the gendarmes. Elodie does not wish to engage in a relationship with him and prefers to devote herself to Yvan and the children. At the wedding of a couple of friends, the ceremony goes wrong. Elodie accumulates problems to the point of putting her job in danger. Encouraged by her mother, she takes refuge for a weekend in a beautiful place, between pleasure and guilt. But while Elodie is unreachable, Chloé, who has made a sad discovery, puts herself in danger...
At the hospital, the Marsais family is divided on the responsibilities around the drama. Elodie struggles to make peace with Yvan and distance herself from Bruno. Chloe is upset. That's when Elodie has to hide a student. A rain of professional problems falls on Yvan. Achilles investigates Bruno. Bruno offers his help to hide the girl. It multiplies the manipulations. Encouraged by his friend Justine, Achille sets a trap for Bruno...
Bruno takes revenge on Achille, who risks being expelled from high school. Elodie discovers that she took reckless risks, with serious consequences. Followed by hostile young people, Elodie is forced to call Bruno for help... Yvan is finally ready to listen to Achille's suspicions. But Bruno has other tricks up his sleeve. Only Elodie seems to be able to stop him.
The Marsais organize themselves to fight Bruno. Suspicious, the latter believes for his part that all shots are allowed to destroy those who oppose his plans. Elodie understands that Bruno has tricked her. The gendarmes arrive at the Marsais, suspected of the worst. Elodie is determined to get rid of Bruno at all costs, but he is not a man to let it go...
