Robert d'Eglantine invites his friends to spend a few days in an old country house where he proposes them to embark on a daring adventure with a surprising destination.

Zachary is 20 years old. Dark and independent, he collects amorous conquests and school failure. Sarah is 18 years old. First class, fragile, she fills her emotional gaps with perfect control of his life. Nothing should close and yet, the year of the tank, for six months, they will live a love against which nothing can be, the true, the big one that marks a life forever.