Henri Mohen, in his fifties, bitter and disillusioned author, had a unique and dazzling success 25 years ago, since it's nothingness. Caught between his debts and a blood-sucking family, he dreams of a return to his youth and his heyday. One evening, a huge dog, with compulsive sexual activity, and ill-mannered, decides to settle in the family home "in crisis" for the great happiness of Henri but to the chagrin of his children and especially his wife. This newcomer will act as a revealer of Henri's existential aspirations and bring everyone's resentment to the surface.