Sophie and Julien met on the Internet. After days of written exchanges, they finally met in person for the first time. Julien is curiously quiet.

A young man frustrated by his bachelorhood spends another day alone at home. The day after a strange party, a scratch of unknown origin adorns his arm. The scratch causes unexpected side effects, unleashing the true 'wolf' that lies dormant in his dreams.

Julien meets his girlfriend Marie's siblings for the first time during a weekend at their country house. While everyone welcomes him warmly, one of the brothers seems more resistant, for no apparent reason. Suddenly, after dinner, fueled by alcohol and a refused cigarette, one physically attacks the other.