Settled in her love life, Isabelle, helped by her kids, tries her best to welcome husband’s Franck daughter Sybille with style. She’s supposed to come for a week’s holiday but things start going wrong as soon as she steps through the door … calling Isabelle “Mam” and expressing a desire to move in with her dad. More troubled by this situation than she lets on, Isabelle starts making mistakes … so much so that fearing for her health, she consults a doctor who convinces her she might have a brain tumor. Feeling the call of possible death, the head of the family tries to get things settled for after she’s gone, while Sybille keeps driving the whole tribe crazy! Things are definitely bound to get interesting!